MCQ Questions for Class 7 Science Chapter 6 Physical and Chemical Changes with Answers

Physical and Chemical Changes Class 7 MCQ Online Test With Answers Questions

Check the below Online Education NCERT MCQ Questions for Class 7 Science Chapter 6 Physical and Chemical Changes with Answers Pdf free download. MCQ Questions for Class 7 Science with Answers were prepared based on the latest exam pattern. We have Provided Physical and Chemical Changes Class 7 Science MCQs Questions with Answers to help students understand the concept very well. https://ncertmcq.com/mcq-questions-for-class-7-science-with-answers/

You can refer to NCERT Solutions for Class 7 Science Chapter 6 Physical and Chemical Changes to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Class 7 Science Chapter 6 MCQ With Answers

Science Class 7 Chapter 6 MCQs On Physical and Chemical Changes

Choose the correct answer:

Class 7 Science Chapter 6 MCQ Question 1.
In which type of change a new substance is formed?
(a) In physical change
(b) In chemical change
(c) In both (a) and (b)
(d) In neither of these

Answer

Answer: (b) In chemical change

Physical And Chemical Changes Class 7 MCQ Question 2.
Which among the following is a physical change?
(a) Cutting a log of wood in small pieces
(b) Burning of wood
(c) Ripening of fruit
(d) Cooking of food

Answer

Answer: (a) Cutting a log of wood in small pieces

MCQ Questions For Class 7 Science Chapter 6 Question 3.
Which of the following is a chemical change?
(a) Bursting of a fire cracker
(b) Germination of seed
(c) Coal formation from buried trees
(d) All of these

Answer

Answer: (d) All of these

Class 7 Science Ch 6 MCQ Question 4.
Which is a method to prevent rust?
(a) Crystallization
(b) Sedimentation
(c) Galvanisation
(d) None of these

Answer

Answer: (c) Galvanisation

Ncert Class 7 Science Chapter 6 MCQ Question 5.
How crystal of pure substances are obtained?
(a) By crystallization
(b) By chromatography
(c) By peptization
(d) By all these methods

Answer

Answer: (a) By crystallization

Physical And Chemical Changes MCQ Class 7 Question 6.
What is the formula of rust?
(a) Fe2O3
(b) Fe3O4
(c) FeO
(d) None of these

Answer

Answer: (a) Fe2O3

Class 7th Science Chapter 6 MCQ Question 7.
What will happen if carbon dioxide gas is passed through lime water ?
(a) Calcium carbonate is formed
(b) The lime water turns milky
(c) Both of these
(d) None of these

Answer

Answer: (c) Both of these

Class 7 Chapter 6 Science MCQ Question 8.
Iron pillar near the Qutub Minar in Delhi is famous for the following facts. Which of these facts is responsible for its long stability?
(a) It is more than 7 metres high
(b) It weighs about 6000 kg
(c) It was built more than 1600 years ago
(d) It has not rusted after such a long period

Answer

Answer: (d) It has not rusted after such a long period

Science Class 7 Chapter 6 MCQ Question 9.
Galvanisation is a process used to prevent the rusting of which of the following?
(a) Iron
(b) Zinc
(c) Aluminium
(d) Copper

Answer

Answer: (a) Iron

Class 7 Physical And Chemical Changes MCQ Question 10.
Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a:
(a) physical change that can be reversed
(b) chemical change that can be reversed
(c) physical change that cannot be reversed
(d) chemical change that cannot be reversed

Answer

Answer: (a) physical change that can be reversed

Match the following:

Column A Column B
(i) Rust (а) Calcium hydroxide (Ca(OH) 2)
(ii) Vinegar (b) Ferric oxide (Fe2O3)
(iii) Baking soda (c) Copper sulphate (CuSO4)
(iv) Lime water (d) Acetic acid (CH3COOH)
(v) Neela thotha (e) Sodium hydrogen carbonate (NaHCO3)
Answer

Answer:

Column A Column B
(i) Rust (b) Ferric oxide (Fe2O3)
(ii) Vinegar (d) Acetic acid (CH3COOH)
(iii) Baking soda (e) Sodium hydrogen carbonate (NaHCO3)
(iv) Lime water (а) Calcium hydroxide (Ca(OH) 2)
(v) Neela thotha (c) Copper sulphate (CuSO4)

Fill in the blanks:

1. Changes that lead to the formation of new substances are called ………………….

Answer

Answer: chemical changes

2. Melting of candle wax is a change but its burning is a …………………. change.

Answer

Answer: physical, chemical

3. Energy is …………………. in the formation of curd from milk.

Answer

Answer: evolved

4. A brown layer formed when an iron article is left exposed in an open area is called ………………….

Answer

Answer: rust

5. The brown layer deposited on an iron nail dipped in copper sulphate solution is due to ………………….

Answer

Answer: copper metal

6. Large crystals of pure substance are obtained by ………………….

Answer

Answer: crystallisation

Choose the true and false statements from the following:

1. The cooking of rice is a physical change.

Answer

Answer: False

2. When you cut an apple with knife interactions between the apple and the knife take place.

Answer

Answer: True

3. When catechu (kaththa) is applied on lime while making a pan (bettle) a chemical change takes place.

Answer

Answer: True

4. Eruption of volcano is a reversible change.

Answer

Answer: False

5. Formation of clouds is a reversible change.

Answer

Answer: True

6. The salt obtained by evaporation is pure.

Answer

Answer: False

7. Both oxygen and water are essential for rusting.

Answer

Answer: True

8. In chemical changes new substances are produced.

Answer

Answer: True

We hope the given NCERT MCQ Questions for Class 7 Science Chapter 6 Physical and Chemical Changes with Answers Pdf free download will help you. If you have any queries regarding Physical and Chemical Changes CBSE Class 7 Science MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Class 7 Science MCQ:

MCQ Questions for Class 7 Science Chapter 18 Wastewater Story with Answers

Wastewater Story Class 7 MCQ Online Test With Answers Questions

Check the below Online Education NCERT MCQ Questions for Class 7 Science Chapter 18 Wastewater Story with Answers Pdf free download. MCQ Questions for Class 7 Science with Answers were prepared based on the latest exam pattern. We have Provided Wastewater Story Class 7 Science MCQs Questions with Answers to help students understand the concept very well. https://ncertmcq.com/mcq-questions-for-class-7-science-with-answers/

You can refer to NCERT Solutions for Class 7 Science Chapter 18 Wastewater Story to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Class 7 Science Chapter 18 MCQ With Answers

Science Class 7 Chapter 18 MCQs On Wastewater Story

Choose the correct answer:

Wastewater Story Class 7 MCQ Chapter 18 Question 1.
Which one of the following is a quality of wastewater?
(a) Foul smell
(b) Bad taste
(c) Dirty look
(d) All of these

Answer

Answer: (d) All of these

Class 7 Science Chapter 18 MCQ Question 2.
Period 2005-2015 is being celebrated as the international decade for action on
(a) water for life
(b) education for all
(c) global war
(d) terrorism

Answer

Answer: (a) water for life

Waste Water Story Class 7 MCQ Chapter 18 Question 3.
In sewerage manholes are located at every
(a) 20-25 m
(b) 50-60 m
(c) 90-100 m
(d) 100-110 m

Answer

Answer: (b) 50-60 m

Class 7 Science Ch 18 MCQ Question 4.
Which one of the following is a step in wastewater treatment?
(a) Aeration
(b) Filtration
(c) Chlorination
(d) All of these

Answer

Answer: (d) All of these

Ncert Class 7 Science Chapter 18 MCQ Question 5.
Sludge in separate tanks is decomposed to get biogas by
(a) yeasts
(b) aerobic bacteria
(c) anaerobic bacteria
(d) none of these

Answer

Answer: (c) anaerobic bacteria

MCQ On Wastewater Story Class 7 Chapter 18 Question 6.
Which one of the following is used in vermi-processing toilet?
(a) Earthworm
(b) Cockroach
(c) Both of these
(d) None of these

Answer

Answer: (a) Earthworm

Waste Water Management Class 7 MCQ Chapter 18 Question 7.
Sewage is mainly a
(a) liquid waste
(b) Solid waste
(c) gaseous waste
(d) Mixture of solid and gas

Answer

Answer: (a) liquid waste

MCQ On Waste Water Story Class 7 Chapter 18 Question 8.
Which of the following is/are products of wastewater treatment?
(a) Biogas
(b) Sludge
(c) Both Biogas and sludge
(d) Aerator

Answer

Answer: (c) Both Biogas and sludge

MCQ Questions For Class 7 Science Chapter 18 Question 9.
Open drain system is a breeding place for which of the following:
(a) Files
(b) Mosquitoes
(c) Organisms which cause diseases
(d) All of these

Answer

Answer: (d) All of these

MCQ Questions For Class 7 Science With Answers Chapter 18 Question 10.
Which of the following is not a source of waste water?
(a) Sewers
(b) Homes
(c) Industries
(d) Hospitals

Answer

Answer: (a) Sewers

Match the following:

Column A Column B
(i) Sewerage (a) Decompose sludge
(ii) Bar screens (b) Used in vermi-processing toilet
(iii) Anaerobic bacteria (c) Remove large objects from wastewater
(iv) Cooking oil and fats (d) Disinfect water
(v) Earthworm (e) Block the pipes
(vi) Chlorine and ozone (f) Transport system that carries sewage
Answer

Answer:

Column A Column B
(i) Sewerage (f) Transport system that carries sewage
(ii) Bar screens (c) Remove large objects from wastewater
(iii) Anaerobic bacteria (a) Decompose sludge
(iv) Cooking oil and fats (e) Block the pipes
(v) Earthworm (b) Used in vermi-processing toilet
(vi) Chlorine and ozone (d) Disinfect water

Fill in the blanks:

1. ………………… is generated in homes, industries, agricultural field and in other human activities. This is called …………………

Answer

Answer: Wastewater, sewage

2. Sewage is a liquid waste which causes ………………… and ………………… pollution.

Answer

Answer: water, soil

3. Wastewater is treated in ………………… treatment plant.

Answer

Answer: wastewater/sewage

4. Byproducts of wastewater treatment are ………………… and …………………

Answer

Answer: sludge, biogas

5. Open drain system is a breeding place for flies, mosquitoes and organisms which cause …………………

Answer

Answer: diseases

6. Dried sludge is used as …………………

Answer

Answer: manures

Choose the true and false statements from the following:

1. Wastewater cannot be reused.

Answer

Answer: False

2. Treatment plants reduce pollutants in wastewater to a level where nature can take care of it.

Answer

Answer: True

3. Poor sanitation and contaminated drinking water is the cause of a large number of diseases.

Answer

Answer: True

4. We should not defecate in open because untreated human excreta is a health hazard.

Answer

Answer: True

5. Chemicals like chlorine and ozone are used to disinfect water.

Answer

Answer: True

6. Cooking oil and fats should not be thrown down the drain because they can harden and block the pipes.

Answer

Answer: True

We hope the given NCERT MCQ Questions for Class 7 Science Chapter 18 Wastewater Story with Answers Pdf free download will help you. If you have any queries regarding Wastewater Story CBSE Class 7 Science MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Class 7 Science MCQ:

MCQ Questions for Class 11 Physics Chapter 11 Thermal Properties of Matter with Answers

Thermal Properties of Matter Class 11 MCQ Online Test With Answers Questions

Check the below NCERT MCQ Questions for Class 11 Physics Chapter 11 Thermal Properties of Matter with Answers Pdf free download. MCQ Questions for Class 11 Physics with Answers were prepared based on the latest exam pattern. We have provided Thermal Properties of Matter Class 11 Physics MCQs Questions with Answers to help students understand the concept very well.

Class 9 Physics Chapter 11 MCQ With Answers

Physics Class 9 Chapter 11 MCQs On Thermal Properties of Matter

Thermal Properties Of Matter MCQ Pdf Question 1.
Absorptive power of perfectly black body is
(a) Zero
(b) Infinity
(c) One
(d) Constant

Answer

Answer: (c) One

Thermal Properties Of Matter Class 11 MCQ Question 2.
A black body at hot temperature at 227°C radiates heat at a rate of 5 cal/cm²s. at a temperature of 727°C the rate of heat radiated per unit area will be
(a) 50 cal/cm²s
(b) 250 cal/cm²s
(c) 80 cal/cm²s
(d) 100 cal/cm²s

Answer

Answer: (c) 80 cal/cm²s

Thermal Properties Of Matter MCQ Question 3.
A body cools from 50°C to 46°C in 5 minutes and to 40°C in the next 10 minutes. The surrounding temperature is
(a) 30°C
(b) 28°C
(c) 36°C
(d) 32°C

Answer

Answer: (a) 30°C

MCQ On Thermal Properties Of Matter Class 11 Question 4.
For which of the following process, the thermal conduction is maximum?
(a) Combustion
(b) Radiation
(c) Convection
(d) Conduction

Answer

Answer: (b) Radiation

Thermal Properties Of Matter MCQs Question 5.
A bucket full of hot water is kept in a room and it cools from 75°C to 70°C in t1 minutes from 70°C to 65°C in t2 minutes and from 65°C to 60°C in t3 minutes; then
(a) t1 – t2 = t3
(b) t1 < t2 < t3
(c) t1 > t2 > t3
(d) t1 < t2 > t3

Answer

Answer: (b) t1 < t2 < t3

MCQ On Thermal Properties Of Matter Question 6.
The good absorber of heat are
(a) Non-emitter
(b) Poor-emitter
(c) Good-emitter
(d) Highly polished

Answer

Answer: (c) Good-emitter

MCQs On Thermal Properties Of Matter Question 7.
Two stars A and B radiate maximum energy at 3600°A and 3600°A respectively. Then the ratio of absolute temperatures of A and B is
(a) 256 : 81
(b) 81 : 256
(c) 3 : 4
(d) 4 : 3

Answer

Answer: (d) 4 : 3

Thermal Properties Of Matter Questions And Answers Pdf Question 8.
A person with dark skin as compared to a person with white skin will experience
(a) Less heat and less cold
(b) More heat and more cold
(c) More heat and less cold
(d) Less heat and more cold.

Answer

Answer: (b) More heat and more cold

MCQ Of Thermal Properties Of Matter Question 9.
A cup of tea cools from 80°C to 60°C in one minute. The ambient temperature is 30°C. in cooling from 60°C to 50°C, it will take.
(a) 50 sec
(b) 90 sec
(c) 60 sec
(d) 30 sec

Answer

Answer: (a) 50 sec

Physics Chapter 11 Heat MCQs Question 10.
The best ideal black body is
(a) Lamp of charcoal heated to high temperature
(b) Metal coated with a black dye
(c) Glass surface coated with coalter
(d) Hollow enclosure blackened inside and having a small hole

Answer

Answer: (d) Hollow enclosure blackened inside and having a small hole

Class 11 Physics Thermal Properties Of Matter MCQ Question 11.
The earth intercepts approximately one billionth of the power radiated by the sun. if the surface temperature of the sun were to drop by a factor of 2, the average radiant energy incident on earth per second would reduce by factor of
(a) 2
(b) 4
(c) 8
(d) 16

Answer

Answer: (d) 16

MCQ Questions For Class 11 Physics Chapter 11 Question 12.
The process of heat transfer in which heat is transferred with actual migration of medium particles is known as (AFMC-94)
(a) Conduction
(b) Convection
(c) Radiation
(d) Reflection

Answer

Answer: (b) Convection

Questions On Thermal Properties Of Matter Question 13.
Unit of Stefans constant is given by
(a) W/ m K²
(b) W/ m² K²
(c) W²/ m² K4
(d) W/ mK

Answer

Answer: (b) W/ m² K²

Class 11 Physics Chapter 11 MCQ Question 14.
A metal piece heated to T1°K. The temperature of the surrounding is T2°K. the heat in the surrounding due to radiation is proportional to
(a) (T14 – T24)
(b) (T1 – T2)4
(c) (T14 + T24)
(d) (T13 – T23)

Answer

Answer: (a) (T14 – T24)

Thermal Properties Of Matter Class 11 Extra Questions Question 15.
The earth receives at its surface radiation from the sun at the rate of 1400 W/m². the distance of the centre of the sun from the surface of the earth is 1.5 1011 m and the radius of the sun is 7.0 108 m. treating sun as a black body, it follows from the above data that its surface temperature is,
(a) 5801 K
(b) 106 K
(c) 50.1 K
(d) 2801 C

Answer

Answer: (a) 5801 K

Question 16.
A surface at temperature T0°K receives power P by radiation from a small sphere at temperature T >> T0 and at a distance d. if both T and d are doubled, the power received by surface will becomes approximately
(a) P
(b) 2p
(c) 4p
(d) 16p

Answer

Answer: (c) 4p

Question 17.
The temperature of a piece of metal is raised from 27°C to 51.2°C. the rate at which metal radiates energy increases nearly
(a) 1.36 times
(b) 2.36 times
(c) 3.36 times
(d) 4.36 times

Answer

Answer: (a) 1.36 times

Question 18.
Emissivity of perfectly black body is
(a) 1
(b) 2
(c) 5
(d) 0

Answer

Answer: (a) 1

Question 19.
The good absorber of heat are
(a) Non-emitter
(b) Poor-emitter
(c) Good-emitter
(d) Highly polished

Answer

Answer: (c) Good-emitter

Question 20.
Co-efficient of reflection, coefficient of absorption and coefficient transmission are related as
(a) a + r + 1 = 1
(b) a + r + t1 1
(c) a + r = -t
(d) a1 r + 1

Answer

Answer: (a) a + r + 1 = 1

We hope the given NCERT MCQ Questions for Class 11 Physics Chapter 11 Thermal Properties of Matter with Answers Pdf free download will help you. If you have any queries regarding CBSE Class 11 Physics Thermal Properties of Matter MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Class 11 Physics MCQ:

MCQ Questions for Class 11 Physics Chapter 3 Motion in a Straight Line with Answers

Motion in a Straight Line Class 11 MCQ Online Test With Answers Questions

Check the below NCERT MCQ Questions for Class 11 Physics Chapter 3 Motion in a Straight Line with Answers Pdf free download. MCQ Questions for Class 11 Physics with Answers were prepared based on the latest exam pattern. We have provided Motion in a Straight Line Class 11 Physics MCQs Questions with Answers to help students understand the concept very well.

Class 9 Physics Chapter 3 MCQ With Answers

Physics Class 9 Chapter 3 MCQs On Motion in a Straight Line

Motion In A Straight Line Class 11 MCQ Question 1.
The displacement in metres of a body varies with time t in second as y = t2 – t – 2. The displacement is zero for a positive of t equal to
(a) 1 s
(b) 2 s
(c) 3 s
(d) 4 s

Answer

Answer: (b) 2 s

Class 11 Physics Chapter 3 MCQ Question 2.
A boy starts from a point A, travels to a point B at a distance of 3 km from A and returns to A. If he takes two hours to do so, his speed is
(a) 3 km/h
(b) zero
(c) 2 km/h
(d) 1.5 km/h

Answer

Answer: (a) 3 km/h

Motion In A Straight Line MCQ Question 3.
A 180 metre long train is moving due north at a speed of 25 m/s. A small bird is flying due south, a little above the train, with a speed of 5 m/s. The time taken by the bird to cross the train is
(a) 10 s
(b) 12 s
(c) 9 s
(d) 6 s

Answer

Answer: (d) 6 s

MCQ Questions For Class 11 Physics Chapter 3 Question 4.
A boy starts from a point A, travels to a point B at a distance of 1.5 km and returns to A. If he takes one hour to do so, his average velocity is
(a) 3 km/h
(b) zero
(c) 1.5 km/h
(d) 2 km/h

Answer

Answer: (b) zero

Motion In A Straight Line Class 11 MCQs Question 5.
A body starts from rest and travels with uniform acceleration on a straight line. If its velocity after making a displacement of 32 m is 8 m/s, its acceleration is
(a) 1 m/s²
(b) 2 m/s²
(c) 3 m/s²
(d) 4 m/s²

Answer

Answer: (a) 1 m/s²

Class 11 Physics Chapter 3 MCQ With Answers Question 6.
Which one of the following is the unit of velocity?
(a) kilogram
(b) metre
(c) m/s
(d) second

Answer

Answer: (c) m/s

Motion In Straight Line Class 11 MCQ Question 7.
A body starts from rest and travels for t second with uniform acceleration of 2 m/s². If the displacement made by it is 16 m, the time of travel t is
(a) 4 s
(b) 3 s
(c) 6 s
(d) 8 s

Answer

Answer: (a) 4 s

Ch 3 Physics Class 11 MCQ Question 8.
The dimensional formula for speed is
(a) T-1
(b) LT-1
(c) L-1T-1
(d) L-1T

Answer

Answer: (b) LT-1

Class 11 Physics Ch 3 MCQ Question 9.
The dimensional formula for velocity is
(a) [LT]
(b) [LT-1]
(c) [L2T]
(d) [L-1T]

Answer

Answer: (b) [LT-1]

Motion In Straight Line MCQ Question 10.
A body starts from rest and travels with an acceleration of 2 m/s². After t seconds its velocity is 10 m/s . Then t is
(a) 10 s
(b) 5 s
(c) 20 s
(d) 6 s

Answer

Answer: (b) 5 s

Class 11 Motion In A Straight Line MCQ Question 11.
A boy starts from a point A, travels to a point B at a distance of 1.5 km and returns to A. If he takes one hour to do so, his average velocity is
(a) 3 km/h
(b) zero
(c) 1.5 km/h
(d) 2 km/h

Answer

Answer: (b) zero

Chapter 3 Physics Class 11 MCQ Question 12.
A body starts from rest. If it travels with an acceleration of 2 m/s², its displacement at the end of 3 seconds is
(a) 9 m
(b) 12 m
(c) 16 m
(d) 10 m

Answer

Answer: (a) 9 m

Physics Class 11 Chapter 3 MCQ Question 13.
A body starts from rest and travels with uniform acceleration of 2 m/s². If its velocity is v after making a displacement of 9 m, then v is
(a) 8 m/s
(b) 6 m/s
(c) 10 m/s
(d) 4 m/s

Answer

Answer: (b) 6 m/s

Chapter 3 Physics Class 11 MCQs Question 14.
A body starts from rest and travels with an acceleration of 2 m/s². After t seconds its velocity is 10 m/s. Then t is
(a) 10 s
(b) 5 s
(c) 20 s
(d) 6 s

Answer

Answer: (b) 5 s

MCQ Of Ch 3 Physics Class 11 Question 15.
A body starts from rest and travels for five seconds to make a displacement of 25 m if it has travelled the distance with uniform acceleration a then a is
(a) 3 m/s²
(b) 4 m/s²
(c) 2 m/s²
(d) 1 m/s²

Answer

Answer: (c) 2 m/s²

MCQ On Motion In A Straight Line Question 16:
A boy moves on a circular distance of radius R. Starting from a point A he moves to a point B which is on the other end of the diameter AB. The ratio of the distance travelled to the displacement made by him is
(a) ∏/2
(b) ∏
(c) 2∏
(d) 4∏

Answer

Answer: (a) ∏/2

Class 11 Physics Motion In A Straight Line MCQ With Answers Question 17.
The dimensional formula for acceleration is
(a) [LT2]
(b) [LT?2]
(c) [L2T]
(d) [L2T2]

Answer

Answer: (b) [LT?2]

MCQ Of Chapter 3 Physics Class 11 Question 18.
A body starts from rest and travels with uniform acceleration a to make a displacement of 6 m. If its velocity after making the displacement is 6 m/s, then its uniform acceleration a is
(a) 6 m/s²
(b) 2 m/s²
(c) 3 m/s²
(d) 4 m/s²

Answer

Answer: (c) 3 m/s²

MCQ Class 11 Physics Chapter 3 Question 19.
Which one of the following is the unit of velocity?
(a) kilogram
(b) metre
(c) m/s
(d) second

Answer

Answer: (c) m/s

Physics Chapter 3 MCQ Class 11 Question 20.
The displacement in metres of a body varies with time t in second as y = t2 – t – 2. The displacement is zero for a positive of t equal to
(a) 1 s
(b) 2 s
(c) 3 s
(d) 4 s

Answer

Answer: (b) 2 s

We hope the given NCERT MCQ Questions for Class 11 Physics Chapter 3 Motion in a Straight Line with Answers Pdf free download will help you. If you have any queries regarding CBSE Class 11 Physics Motion in a Straight Line MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Class 11 Physics MCQ:

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

Human Eye and Colourful World Class 10 MCQ Online Test With Answers Questions

Check the below Online Education NCERT MCQ Questions for MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers with Answers Pdf free download. https://ncertmcq.com/mcq-questions-for-class-10-science-with-answers/

Class 10 Science Physics Chapter 11 MCQ With Answers

Physics Class 10 Chapter 11 MCQs On Human Eye and Colourful World

Human Eye And Colourful World Class 10 MCQ Question 1.
A student traces the path of a ray of light through a glass prism for different angles of incidence. He analyses each diagram and draws the following conclusion:
(I) On entering prism, the Lightray bends towards its base.
(II) light ray suffers refraction at the point of incidence and point of emergence while passing through the prism.
(III) Emergent ray bends at a certain angle to the direction of the incident ray.
(IV) White emerging from the prism, the Lightray bends towards the vertex of the prism.
Out of the above inferences, the correct ones are:
(a) (I), (II) and (III)
(b) (I), (III) and (IV)
(c) (II), (III) and (IV)
(d) (I) and (IV)
Answer:
(a) (I), (II) and (III)

Related Theory:
In a prism, the ray of light from air into glass bends towards the normal. The ray of light from glass to air bends away from the normal. In both cases, when a ray of light passes through a prism, it bends towards the base of the prism.

Human Eye And Colourful World MCQ Question 2.
A clear sky appears blue, because:
(a) blue light gets absorbed in the atmosphere
(b) ultraviolet radiations are absorbed in the atmosphere
(c) violet and blue lights get scattered more than the lights of all other colours by the atmosphere
(d) lights of all other colours are scattered more than the violet and blue colour lights by the atmosphere
Answer:

Human Eye Class 10 MCQ Question 3.
Which of the following statements is correct regarding the propagation of light of different colours of white light in the air?
(a) Red light moves the fastest.
(b) Blue light moves faster than green light.
(c) All the colours of the white light travel at the same speed.
(d) Yellow light moves with the mean speed as that of red and violet light.
Answer:

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

Human Eye MCQ Class 10 Question 4.
In the following diagram, the correctly marked angles are:
Human Eye And Colourful World Class 10 MCQ
(a) All
(b) Only ∠i, and ∠A
(c) ∠i, ∠r and ∠A
(d) ∠i, ∠A and ∠D
Answer:

Human Eye And The Colourful World MCQ Question 5.
The bluish colour of water in the deep sea is due to:
(a) the presence of algae and other plants found in water
(b) reflection of the sky in the water
(c) scattering of light
(d) absorption of light by the sea
Answer:
(c) scattering of light

Explanation: The bluish colour of water in the deep sea is due to scattering of light. The fine particles in water scatter mainly blue light having the shortest wavelength.

Related Theory:
Water appears blue because when white light from the Sun falls on the water molecules, only blue light is reflected and scattered and reaches our eyes.
The absorption of light by a molecule depends on the wavelength and the size of the molecule. A molecule absorbs light of a wavelength either equal to or greater than the order of the size of the object.
Since red, orange and yellow have longer wavelengths, they are absorbed by the water molecules, whereas blue, having a shorter wavelength, is scattered.

Colourful World Class 10 MCQ Question 6.
During the experiment, to trace the path of ray of light through the glass prism, students reported the following observations:
(I) The ray of light from air to glass at the first refracting surface bends away from the normal after refraction.
(II) At the second refracting surface, light rays entered from air to glass.
(III) Lightray suffers two refractions on passing through a prism and in each refraction it bends towards the base of the prism.
(IV) Lightray suffers two refractions on passing through a prism. In first refraction, it bends away from the normal while in the second refraction it bends towards the normaL
The correct observation is/are:
(a) (I) and (II) only
(b) (III) only
(c) (II) and (IV) only
(d) (I) and (IV) only
Answer:

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

Class 10 Human Eye And The Colourful World MCQ Question 7.
In an experiment to trace the path of a ray of light through a triangular glass prism, a student would observe that the emergent ray
(a) is parallel to the incident ray.
(b) is along the same direction of incident ray.
(c) gets deviated and bends towards the thinner part of the prism.
(d) gets deviated and bends towards the thicker part (base) of the prism.
Answer:

Class 10 Science Chapter 11 MCQ Question 8.
In the following ray diagram the correctly marked angle are:
Human Eye And Colourful World MCQ
(a) ∠i, and ∠e
(b) ∠A and ∠D
(c) ∠i, ∠e and ∠D
(d) ∠r, ∠A and ∠D
Answer:
(d) ∠r, ∠A and ∠D

Human Eye And Colourful World Class 10 MCQ With Answers Question 9.
A person cannot see distinctly the objects kept beyond 2 m. This defect can be corrected by using a lens of power:
(a) + 0.5 D
(b) – 0.5 D
(c) + 0.2 D
(d) – 0.2 D
Answer:

MCQ Of Human Eye Class 10 Question 10.
A student sitting on the last bench can read the letters written on the blackboard but is not able to read the letters written in his textbook. Which of the following statements is correct?
(a) The near point of his eyes has receded away.
(b) The near point of his eyes has come closer to him.
(c) The far point of his eyes has come closer to him.
(d) The far point of his eyes has receded away.
Answer:
(a) The near point of his eyes has receded away.

Explanation: The student can see the object which is far from him but can’t see nearby objects. It means that the near point of his eyes has receded away. This condition is known as hypermetropia or farsightedness.

MCQ On Human Eye Class 10 Question 11.
When light rays enter the eye, most of the refraction occurs at the:
(a) crystalline lens
(b) the outer surface of the cornea
(c) iris
(d) pupil
Answer:
(b) the outer surface of the cornea

Explanation: Light enters the eye through a thin membrane called the cornea. It causes most of the bending of incident light rays, i.e. refraction, to make them converge which in turn causes image formation on the retina.

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

Ch 11 Science Class 10 MCQ Question 12.
The focal length of the eye lens increases when eye muscles:
(a) are relaxed and the lens becomes thinner
(b) contract and the lens becomes thicker
(c) are relaxed and the lens becomes thicker
(d) contract and the lens becomes thinner
Answer:

The Colourful World Class 10 MCQ Question 13.
Which of the following statements is correct?
(a) A person with myopia can see distant objects clearly.
(b) A person with hypermetropia can see nearby objects clearly.
(c) A person with myopia can see nearby objects clearly.
(d) A person with hypermetropia cannot see distant objects clearly.
Answer:
(c) A person with myopia can see nearby objects clearly.

Explanation: Myopia is also termed as short-sightedness. A person suffering from myopia can see nearby objects clearly but not the distant objects. Whereas hypermetropia is termed as long-sightedness. A person suffering from hypermetropia can see distant objects clearly but not the nearby objects.

Class 10 Science Ch 11 MCQ Question 14.
Person suffering from cataract has:
(a) elongated eyeball
(b) excessive curvature of eye lens
(c) weakened ciliary muscles
(d) opaque eye Lens
Answer:

Human Eye And The Colourful World Class 10 MCQ Question 15.
When we enter a dark room coming from outside, immediately the things inside the room do not appear clear to our eyes. This is because:
(a) pupils do not open at all in the dark.
(b) pupils take time to adjust.
(c) light travels slower in a dark room.
(d) pupils open very quickly in the dark.
Answer:

MCQ Of Colourful World Class 10 Question 16.
The phenomena of light responsible for the working of the human eye is:
(a) reflection
(b) refraction
(c) power of accommodation
(d) persistence of vision
Answer:

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

MCQs On Human Eye And Colourful World Question 17.
The sky appears dark to passengers flying at very high altitudes mainly because:
(a) Scattering of light is not enough at such heights.
(b) There is no atmosphere at great heights.
(c) The size of molecules is smaller than the wavelength of visible light.
(d) The light gets scattered towards the earth.
Answer:
(a) Scattering of light is not enough at such heights.

Explanation: At higher altitude either the atmospheric medium is very rare or there are no particles present/ no atmosphere, thus the scattering of light taking place is not enough at such heights or no scattering of sunlight takes place. Hence, the sky appears dark to the passengers flying at very high altitude.

MCQ Of Human Eye And Colourful World Question 18.
Given below are some common observations related to optics. Select the row containing incorrect observations and its reason.

Observation Reason
(a) Colour of water in deep sea Scattering of light
(b) Apparent position of stars Atmospheric refraction
(c) Fishes appear higher than their actual depth Diffraction of light
(d) Spectrum seen on soap bubbles Dispersion of light

Answer:
(c) Observation: Fishes appear higher than their actual depth, Reason: Diffraction of light

Explanation: Fishes appear higher than their actual depth due to the refraction of light as light travels from water, an optically denser medium, to air, a rarer medium. Diffraction of light refers to the phenomena of bending of light around corners.

Class 10 Physics Human Eye And The Colourful World MCQ Question 19.
The defective eye of a person has near point 0.5 m and far point 75 cm. The table below lists the type of corrective lens and its power required for reading purposes and for seeing distant objects.

Select the row containing the correct information:

For reading purpose For seeing distant objects
(a) Concave lens of  power – 0.5 D Convex lens of power + 0.75 D
(b) Convex lens of power +0.5 D A concave lens of power – 0.75 D
(c) Convex Lens of power + 0.5 D Concave Lens of power-1.33 D
(d) Convex Lens of power + 2.0 D Concave Lens of power -1.33 D

Answer:

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

MCQ Questions For Class 10 Human Eye And Colourful World Question 20.
A 55-year-old near-sighted person wears spectacles with a power of – 2.5 D for distance viewing. His doctor prescribes a correction of + 2.0 D in the near-vision section of his bifocals. This is measured relative to the main part of the lens.

Select the correct statements:
(I) The focal length of the distance-viewing part of the lens is – 40 cm.
(II) The focal length of the near-vision part of the lens is + 50 cm.
(III) The focal length of the distance-viewing part of the lens is + 50 cm.
(IV) The focal length of the near-vision part of the lens is – 40 cm.
(a) Both (I) and (II)
(b) Both (I) and (IV)
(c) Both (II) and (III)
(d) Both (III) and (IV)
Answer:

Class 10 Science Human Eye And Colourful World MCQ Question 21.
A beam of white light falling on a glass prism gets split up into seven colours marked 1 to 7 as shown in the diagram
Select the incorrect statements regarding the colours marked from 1 to 7:
(I) The colour at position marked 7 and 5 are similar to the colour of the blood and colour of gold metal respectively.
(II) The colour at position marked 1 and 3 are similar to the colour of the blood and colour of gold metal respectively.
(III) The colour at position marked 3 and 4 are similar to the colour of the sky and colour of leaves in plants respectively.
(IV) The colour at position marked 5 and 4 are similar to the colour of the sky and colour of leaves in plants respectively.
(a) Both (I) and (II)
(b) Both (I) and (III)
(c) Both (II) and (III)
(d) Both (II) and (IV)
Answer:

Question 22.
The defects of vision hypermetropia and myopia can be corrected by:
(a) Concave and a plano-convex lens
(b) Concave and convex lens
(c) Convex and concave lens
(d) Plano-concave lens for both defects.
Answer:
(c) Convex and concave lens

Explanation: Hypermetropia or farsightedness can be corrected by using convex lens of appropriate power and myopia by a concave lens of appropriate power.

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

Question 23.
The layer of atmosphere whose temperature is less than that of the hotter layer behaves as an optically
(a) denser medium
(b) rarer medium
(c) inactive medium
(d) either denser or rarer medium
Answer:
(a) denser medium

The layer of atmosphere whose temperature is less than that of the hotter layer behaves as an optically

Explanation: The layer of atmosphere whose temperature is less than that of hotter layer is more denser as compared to the hotter layer of the atmosphere. So, when light travels from a cooler layer of atmosphere to a hotter Layer, it will bend away from the normal.

Question 24.
The sun appears white at noon as:
(a) Blue colour is scattered the most
(b) Red colour is scattered the most
(c) Light is least scattered
(d) All the colours of the white light are scattered away
Answer:

Assertion Reasoning questions Class 10 Science Chapter 11

For the following questions, two statements are given-one tabled Assertion (A) and the other labeled Reason (R) select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below: ,
(a) Both (A) and (R) are true and (R) is correct explanation of the (A).
(b) Both (A) and (R) are true but (R) is not correct explanation of the (A).
(c) (A) is true but (R) is false.
(d) (A) is false but (R) is true.

Question 25.
Assertion (A): Sky appears in blue colour.
Reason (R): Blue colour in sunlight travelling through atmosphere undergoes maximum scattering.
Answer:
(a) Both (A) and (R) are true and (R) is the correct explanation of the (A).

Explanation: The blue colour of the sky is due to the scattering of blue colour to the maximum extent by dust particles. The blue colour appears to be coming from the sky. Blue colour has the least wavelength. Hence, the correct option is (a).

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

Question 26.
Assertion (A): When white light passes through a glass prism, red colour has deviated the least.
Reason (R): Red colour has the minimum speed in the glass prism.
Answer:
(c) (A) is true but (R) is false.

Explanation: When white light passes through a glass prism, red colour deviates the least because red colour has maximum speed in the prism.

Question 27.
Assertion (A): When objects are observed through hot air, they appear to be moving slightly.
Reason (R): Hotter air is optically denser and the cooler air is optically rarer.
Answer:

Question 28.
Assertion (A): A rainbow is always formed in the sky after a rain shower and in the same direction as the sun.
Reason (R): Water droplets act as tiny prisms.
Answer:
(d) (A) is false but (R) is true.

Explanation: A rainbow is always formed in the sky in a direction opposite to that of the sun. The water droplets present in the sky act as tiny prisms, which refract and disperse sunlight, then reflect it internally and finally refract it again when it comes out of the raindrop.

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

Question 29.
Assertion (A): The sun’s disc appears to be flattened at sunrise and sunset.
Reason (R): The sun is near the horizon at sunrise and sunset and sunlight suffers atmospheric refraction.
Answer:

(Competency Based Questions (CBQs))

Question 1.
Ankit remarked that he has seen wavering of objects when seen through a stream of hot air rising above a tandoor or a fire. He said that the air just above the fire becomes hotter than the air further higher up. He further said that this wavering can also be seen in the earth’s atmosphere as the earth’s atmosphere is not evenly distributed and several observations can be explained on the basis of this phenomenon.
(A) Name the phenomenon about which Ankit remarked.
(B) Name two observations which can be explained by the above phenomenon.
(C) What is the total time difference on duration of day on earth?
(D) Why don’t planets twinkle?
Answer:
(B) The two observations are: twinkling of stars, advance sunrise, delayed sunset and apparent position of stars. (Any two).
(D) Planets are much closer to the earth and can be considered as extended sources or a collection of several point sources. The total variation in intensity of light entering our eyes from each of these point sources average out to zero, thereby nullifying the twinkling effect.

Question 2.
Renu was returning home after purchasing some medicines for her mother. It was noon and really very hot on that particular day. She tried to look at the sun but the sun was shining so brightly that she could hardly see it directly. She somehow managed to see its reflection on a window and noticed that the colour of sun was white.
Human Eye Class 10 MCQ
At noon, the Sun appears white as:
(a) light is least scattered
(b) all the colours of the white light are scattered away
(c) blue colour is scattered the most
(d) red colour is scattered the most
Answer:
(a) light is least scattered
Explanation: At noon, the sun is directly over head and has lesser air to travel through and thus will be reduced if the distance to be traveled in air is reduced. Less scattering leads to the Sun appearing white as only a little of the blue and violet colour is scattered.
Human Eye MCQ Class 10

Question 3.
Raman is a keen observer and loved the spectacular colours in a rainbow. He also observed the same pattern when he allowed sunlight to pass through a glass prism. He guessed that it is due to the inclined refracting surfaces of a glass prism which is responsible for showing such exciting phenomenon. Whereas, no such phenomenon was observed when light passes through a glass slab.
(A) Name the phenomenon which could explain the formation of rainbow.
Answer:
The phenomenon which could explain the formation of rainbow is dispersion or splitting of light into its component colours.

(B) What is the band of colours known as?
Answer:

(C) What is the cause of formation of band of colours?
Answer:
The cause for formation of spectrum of light is that different colours of Light bend through different angles with respect to the incident ray as light passes through a prism,

(D) Why don’t we observe similar band of colours when light passes through a glass slab?
Answer:
We don’t observe splitting of white light into its component colours when light passes through a glass slab because the refracting surfaces in a glass slab are parallel to each other whereas they are inclined at an angle in a glass prism

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

Question 4.
Sunny and his friends went to the terrace of their apartment building to watch the night sky. They noticed that all apartment buildings had red light installed at the terrace. Sunny had also seen red lights on top of tall towers such as the Pitampura TV tower and even on top of the GSM towers.
Human Eye And The Colourful World MCQ
The danger signals installed at the top of tall buildings are red in colour, These can be easily seen from a distance because among all other colours, the red light:
(a) is scattered the most by smoke or fog
(b) is scattered the least by smoke or fog
(c) is absorbed the most by smoke or fog
(d) moves the fastest in air
Answer:
(b) is scattered the Least by smoke or fog

Explanation: Among all the colours, red is scattered the Least by smoke or fog. This is because the wavelength of red colour is the largest. Thus, it can be easily seen from a distance. Since the wavelength of red light is maximum in the spectrum, it’s penetration power in the air is maximum and so we can see red colour from farther distances, thus, danger signal uses red colour.

Question 5.
Fix a sheet of white paper on a drawing board using drawing pins. Place a glass prism on it in such a way that it rests on its triangular base. Trace the outline of the prism using a pencil. Draw a straight line PE inclined to one of the refracting surfaces, say AB, of the prism. Fix two pins, say at points P and Q, on the line PE as shown in Fig. below.

Look for the images of the pins, fixed at P and Q, through the other face AC. Fix two more pins, at points R and S, such that the pins at R. and S and the images of the pins at P and Q lie on the same straight line. Remove the pins and the glass prism. The line PE meets the boundary of the prism at point E. Similarly, join and produce the points R and S. Let these lines meet the boundary of the prism at E and F, respectively. Join E and F. Draw perpendiculars to the refracting surfaces AB and AC of the prism at points E and F, respectively. Mark the angle of incidence (i), the angle of refraction (r) and the angle of emergence (e) as shown in Fig.
Colourful World Class 10 MCQ
(A) Given below are four statements regarding incident ray, refracted ray and emergent ray in the above figure.
Select the incorrect statements:
(I) PE is the incident ray.
(II) EF is the emergent ray.
(III) EF is the refracted ray and FS is the emergent ray.
(IV)PE is the incident ray and FS is the refracted ray.
(a) Both (1) and (II)
(b) Both (I) and (III)
(c) Both (II) and (IV)
(d) Both (III) and (IV)
Answer:
(c) Both (II) and (IV)

Explanation: Here PE is the incident ray, EF is the refracted ray and FS is the emergent ray. PE is the incident ray as light, is incident on the prism face AB. Light undergoes refraction in the glass prism and bends away from the normal and hence EF is the refracted ray. The ray FS is the emergent ray as light emerges out of the face AC of the prism along this direction.

(B) The angles of incidence (i), refraction (r) and emergence (e) are mentioned in the table below. Select the row containing the correct marking of angles:
Class 10 Human Eye And The Colourful World MCQ
Class 10 Science Chapter 11 MCQ
Answer:

(C) The angle of deviation is the angle between:
(a) Refracted ray and incident ray
(b) Refracted ray and emergent ray
(c) Emergent ray and face AC of the prism
(d) Emergent ray and incident ray
Answer:

(D) In a glass prism, the emergent ray is not parallel to the incident ray as:
(a) The laws of refraction do not hold in the case of glass prism.
(b) The refracting surfaces are inclined at an angle.
(c) The angle of refraction in glass is greater than the angle of incidence.
(d) The angle of refraction in glass is greater than the angle of emergence.
Answer:

(E) If n is the refractive index of glass of which the prism is made, which of the following relations is correct ?
(a) n = \(\frac{\sin \angle i}{\sin \angle r}\)
(b) n = \(\frac{\sin \angle r}{\sin \angle i}\)
(c) n = \(\frac{\sin 90^{\circ}}{\sin \angle e}\)
(d) n = \(\frac{\sin \angle r}{\sin \angle e}\)
Answer:
(a) n = \(\frac{\sin \angle i}{\sin \angle r}\)

Question 6.
While walking along the beach in Mumbai, Madhuri and her friends were amazed at the beauty of the setting sun and its reflection on the sea against the backdrop of buildings. They observed that the sun appeared reddish at sunset and even at sunrise.
Human Eye And Colourful World Class 10 MCQ With Answers
Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?
(a) Dispersion of light
(b) Scattering of light
(c) Total internal reflection of light
(d) Reflection of light from Earth
Answer:
(b) Scattering of light

Explanation: Scattering of light contributes to the reddish appearance of the Sun at sunrise or sunset. Near the horizon, most of the blue light and shorter wavelengths are scattered away by the particles. Therefore, the light that reaches our eyes is of longer wavelengths. The red light has the maximum wavelength. This gives rise to the reddish appearance of the Sun.

Related Theory
Light from the Sun, near the horizon, passes through thicker layers of air and a large distance in Earth’s atmosphere before reaching our eyes. Near the horizon, most of the blue light and shorter wavelengths are scattered awau by the particles. Therefore, the light that reaches our eyes is of longer wavelengths. The red light has the maximum wavelength. This gives rise to the reddish appearance of the Sun.

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

Question 7.
Place a strong source (S) of white light at the focus of a converging lens (Lj). Allow the light beam to pass through a transparent glass tank (T) containing clear water. Allow the beam of light to pass through a circular hole (c) made in a cardboard. Obtain a sharp image of the circular hole on a screen (MN) using a second converging lens (Ly), as shown in Fig. below.
Dissolve about 200 g of sodium thiosulphate (hypo) in about 2 L of clean water taken in the tank. Add about 1 to 2 mi of concentrated sulphuric acid to the water.
MCQ Of Human Eye Class 10
(A) What is the role of lenses L1 and L2 in the activity?

Role of Lens L1 Role of Lens L2
(a) Converges a beam of light placed at S  Converges a parallel beam of light
(b) Provides a parallel beam of light  Converges a parallel beam of light
(c) Provides a parallel beam of light  Provides a parallel beam of light
(d) Converges a beam of light placed at S  Provides a parallel beam of light

Answer:

(B) When about 200 g of sodium thiosulphate (hypo) is dissolved in about 2 L of clean water taken in the tank and about 1 to 2 mL of concentrated sulphuric acid is added to the water, it is observed that:
(a) A true solution is formed after 2 to 3 minutes.
(b) A suspension of sodium is formed in the tank
(c) Sulphur particles start precipitating in about 2 to 3 minutes.
(d) No change is observed.
Answer:
(c) Sulphur particles start precipitating in about 2 to 3 minutes.

Explanation: We will find fine microscopic sulphur particles precipitating in about 2 to 3 minutes due to the reaction between sulphuric acid and sodium thiosulphate.

(C) The observations regarding change in colour of light in the tank about 2 to 3 minutes after adding sulphuric acid to hypo is:
(I) Blue light can be seen from the side of the tank facing the circular hole.
(II) Blue light can be seen from the three sides of the glass tank.
(III) At first orange-red light and then red light can be seen from the side of the tank facing the circular hole.
(IV) At first orange-red light and then red light can be seen from the three sides of the glass tank.
Select the incorrect observations:
(a) Both (I) and (III)
(b) Both (II) and (III)
(c) Both (I) and (IV)
(d) Both (II) and (IV)
Answer:

(D) The observations can be explained by the phenomenon of:
(a) Scattering of light
(b) Reflection of light
(c) Refraction of light
(d) Dispersion of light
Answer:

(E) The activity above helps us in understanding:
(a) Twinkling of stars
(b) Formation of rainbow
(c) Advance sunrise and delayed sunset
(d) Reddish appearance of the Sun at the sunrise
Answer:
(d) Reddish appearance of the Sun at the sunrise

Explanation: This activity demonstrates the scattering of light that helps us to understand the bluish colour of the sky and the reddish appearance of the Sun at the sunrise or the sunset. Near the horizon, most of the blue light and shorter wavelengths are scattered away by the particles. Therefore, the light that reaches our eyes is of longer wavelengths. This gives rise to the reddish appearance of the Sun.

Question 8.
Parth noticed that his father had two sets of spectacles. So he asked him the reason for the same. His father explained that one spectacle is for viewing distant objects while the other is for reading books. It means that his father had both the defects of vision- farsightedness as well as nearsightedness.
MCQ On Human Eye Class 10
The defect of vision in which the image of nearby objects is formed behind the retina is
(a) Near sightedness
(b) Cataract
(c) Far sightedness
(d) Presbyopia
Answer:
(c) Far sightedness

Explanation: Farsightedness or hypermetropia is the defect of vision in which the image of a nearby object is formed behind the retina due to either long focal length of the eye lens or shortening of the eye ball.

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

Question 9.
We’ve all seen that part in the movie where the weary desert wanderer has been walking for hours and is dying of thirst. Then he happens upon a vast body of water on the horizon. He runs towards the water, it grows closer and closer, until he springs himself into the air only to land back down in the sand and no water in sight. Well, that is due to an optical illusion called Mirage.

Mirage is an optical phenomenon which creates an illusion of the presence of water and is a result of refraction of light from a non-uniform medium. Mirage is observed mainly during sunny days when driving on a roadway. Normally, light waves from the sun travel straight through the atmosphere to your eye. But, light travels at different speeds through hot air and cold air.

Mirages happen when the ground is very hot and the air is cool and a ray of light gets refracted more and more away from the normal. At a particular angle when a ray of light exceeds critical angle, total internal reflection takes place and ray of light gets reflected in the same medium. When the reflected ray reaches our eye, it appears as coming from tree or sky and hence the inverted image of tree creates an impression from a pond of water.
Ch 11 Science Class 10 MCQ
(A) Mirage is an example of:
(a) Reflection of tight and Refraction of Light
(b) Dispersion of Light
(c) Total internat Reflection
(d) Refraction of Ught and Total internal Reflection of Light
Answer:
(d) Refraction of light and Total Internal Reflection of Light

Explanation: As the air just above the ground is hotter than the air above it, light traveling from a distant object travels from a denser medium to a rarer medium and hence bends away from the normal. So, it undergoes refraction. Since light is travelling from a denser medium to a rarer medium, at a certain angle which is greater than the critical angle, the light undergoes total internal reflection.

(B) Mirages are more common in:
(a) rainforests
(b) dry forests
(c) deserts
(d) highlands
Answer:
(c) deserts

Mirages are more common in:

Explanation: Mirages are formed on hot sunny days in deserts or road surfaces when the air just above the ground is much hotter than the air above it.

(C) Mirage is formed because:
(I) Air above the ground is very hot and air above is cooler
(II) Air above the ground is cooL and air above is warmer.
(III) Light rays from a distant object bend towards the normal when coming towards the ground.
(IV) Light rays from a distant object bend away from the normal when coming towards the ground.
(a) Both (I) and (III)
(b) Both (I) and (IV)
(c) Both (II) and (III)
(d) Both (II) and (IV)
Answer:
(b) Both (I) and (IV)

Explanation: Mirage is formed on a hot day when the air just above the ground is hotter than the air above it. As hotter air is optically rarer than cooler air, light traveling from a distant object travels from a denser medium to a rarer medium and hence bends away from the normal. Since light is travelling from a denser medium to a rarer medium, at a certain angle which is greater than the critical angle, the light undergoes total internal reflection.

(D) Atmospheric refraction occurs because:
(a) Refractive index in medium is gradually changing
(b) Of presence of dust particles in atmosphere
(c) Large amount of moisture is present in atmosphere on a humid day
(d) Sun’s rays travel the most when sun is near the horizon
Answer:

(E) When starlight enters the earth’s atmosphere:
(a) it bends away from the normal
(b) It bends towards the normal
(c) It first bends towards the normal and then away from the normal
(d) It first bends away from the normal and then towards the normal.
Answer:

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

Question 10.
The rising sun looks so beautiful! On a trip to a hill station, Raj was overjoyed to see such a beautiful sight of the sun just rising above the horizon! But his father later told him that the sun had not risen yet and what he is actually seeing is due to an optical phenomenon!
The Colourful World Class 10 MCQ
Why is the sun visible to us 2 minutes before actual sunrise and 2 minutes after actual sunset?
Class 10 Science Ch 11 MCQ
Answer:
The sun is visible to us 2 minutes before actual sunrise and 2 minutes after actual sunset due to the phenomenon of atmospheric refraction. During this time when the sun is still below the horizon, the sun’s rays enter the earth’s atmosphere and undergo continuous refraction and bend towards the normal as the refractive index increases continuously as we reach the earth’s surface. So. the sun is visible to us.

Question 11.
The inner workings of the human eye are corn ple but at the same time, fascinating. Have you wondered how exactly they do work or what are the major parts of the eye involved in creating Vision? It helps us in visualizing objects and also helps us in light perception, color, and depth perception. Besides, these sense organs are pretty much similar to cameras, and they help us see objects when light coming from outside enters into them. The structures and functions of the eyes are complex. Each eye constantly adjusts the amount of light it lets in, focuses on objects near and far, and produces continuous images that are instantly transmitted to the brain.
Human Eye And The Colourful World Class 10 MCQ
(A) The image formed by eye tens ¡s:
(a) Real and erect
(b) Virtual and erect
(c) Real and inverted
(d) Virtual and inverted
Answer:
(c) Real and inverted

Explanation: The eye Lens forms an inverted and real image of the object on the retina as eye tens is a convex lens.

(B) Most of the refraction for the light rays entering the eye occurs at:
(a) Outer surface of the cornea.
(b) Eye Lens
(c) Pupil
(d) Vitreous humour
Answer:
(a) Outer surface of the cornea.

Explanation: Most of the refraction for the Light rays entering the eye occurs at the Outer surface of the cornea. The crystalline Lens mereLy provides the finer adjustment of focal length required to focus objects at different distances on the retina.

(C) Select the correct statements:
(I) The change in the curvature of the eye lens can change its focal length.
(II) When the citiary muscles are relaxed, the Lens becomes thin and its focal length decreases.
(III) When the ciliary muscles contract, the Lens becomes thicker and its focal length increases.
(IV)Thin tens enables us to view distant objects clearly whereas thick lens enables us to see nearby objects clearly.
(a) Both (I) and (III)
(b) Both (I) and (IV)
(c) Both (II) and (III)
(d) Both (II) and (IV)
Answer:

(D) The near point and far point of a young adult with normal vision is:
(a) Near point = 0 cm and Far point = 25cm
(b) Near point = 25 cm and far point = 50 m
(c) Near point = 0 m and far point = infinity
(d) Near point = 25 cm and far point = infinity
Answer:

(E) Select the row containing incorrect part of human eye and its function

Part of Human Eye Function
(a) Retina  Delicate membrane having Large number of Light-sensitive cells.
(b) Iris  Changes the curvature of eye Lens
(c) Cornea  A thin membrane through which Light enters the eye
(d) Pupil  An aperture that regukites and controls the amount of Light

Answer:
(b) Part of Human Eye: Iris; Function: Change the curvature of eye Lens.

Explanation: Iris is a dark muscular assembly that controls the size of the pupil. The muscle that changes the curvature of eye lens is ciliary muscles.

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

Question 12.
Shradhas parents took her grandfather to the eye speciaList as he was complaining of difficulty in seeing things. The doctor diagnosed it as cataract and said that it is quite common in old age.
MCQ Questions For Class 10 Science Chapter 11
What is cataract? How is it caused? How can it be corrected?
Answer:
The condition when there is partial or complete loss of vision in the eye of people at old age is known as cataract. It is caused when the crystalline lens of eye becomes milky andcloudy.

It can be corrected through a cataract surgery.

Question 13.
Piyush, who was a backbencher in class, started complaining of frequent headaches. His parents took him to the nearest clinic and the doctor referred him to the eye specialist. The eye specialist tested his vision and asked Piyush whether he was able to read whatever the teacher wrote on the blackboard clearly or not. He replied in the negative. The doctor told his parents about the defect of vision that Piyush was suffering from and advised corrective glasses.
After wearing the glasses, Piyush was now able to read the black board clearly and also got rid of his headaches.
MCQ Of Colourful World Class 10
(A) @Piyush was suffering from:
(a) Cataract
(b) Myopia
(c) Hypermetropic
(d) Presbyopia
Answer:

(B) Select the correct statements regarding the defect of vision Piyush was suffering from:
(I) A person with this defect has the far point nearer than infinity.
(II) A person with this defect has the near point greater than the least distance of distinct vision.
(III) A person suffering from this defect may see clearly upto a distance of a few metres.
(IV) A person suffering from this defect may not see clearly beyond the near point.
(a) Both (I) and (III)
(b) Both (II) and (III)
(c) Both (I) and (IV)
(d) Both (II) and (IV)
Answer:
(a) Both (I) and (III)

Explanation: As Piyush is suffering from myopia, a person with this defect has the far point nearer than infinity. A person suffering from this defect may see clearly upto a distance of a few metres. That is why myopia is also known as short sightedness.

(C) Which of the following is not true about the defect of vision Piyush is suffering from ?
(a) It is caused due to excessive curvature of the eye lens
(b) It may be caused due to elongation of the eyeball.
(c) The image of a distant object is formed behind the retina.
(d) It is corrected by using a concave lens of appropriate power.
Answer:

(D) The far point of a myopic person is 50 cm in front of the eyes. The nature and power of the lens required for correct the problem is:

Nature of Lens Power of Lens
(a) Concave  – 0.5 D
(b) Concave  – 2.0 D
(c) Convex  + 0.5D
(d) Convex  + 2.0D

Answer:
(b) Nature of Lens – Concave: Power of Lens – 2.0 D

Explanation: To find the focal length, we use the lens formula
\(\frac{1}{f}=\frac{1}{v}-\frac{1}{u} \Rightarrow \frac{1}{f}=-\frac{1}{50}\) ⇒ f = – 0.5 m
Power of the lens = \(-\frac{1}{0.5}\) = – 2.0 D
As focal length of the corrective lens is negative, the type of lens used is a concave lens.

(E) A person needs a lens of power – 4.5 D for correction of her vision. The nature of lens and its focal length is:

Nature of Lens Focal length
(a) Concave  – 45cm
(b) Convex – 45cm
(c) Convex  + 22.22 cm
(d) Concave  + 22.22 cm

Answer:
(d) Nature of Lens – Concave :Focal Length – 22.22 cm

Explanation: It is given that the power of the corrective lens = – 4.5 D. We know that
As the focal length is negative, the lens is a concave lens.

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

Question 14.
Pankaj noticed that while reading books or newspaper, most people keep the book neither too far nor too close to their eyes. So, he himseLf tried to find out what happens when he tried to read the book by keeping the book quite far. He immediately said that he could not read all Letters clearly. When he tried to read a book by keeping it very dose to his eyes, the letters had become blurred and his eyes started paining!
MCQ Questions On Human Eye And Colourful World
Why is a normal eye not able to see clearly the objects placed closer than 25 cm?
Answer:
The normal eye has the remarkable property to see objects when placed at any distance from the eye due to the ability of the eye lens to adjust its focal length which is called accommodation. However, the normal eye is not able to see clearly objects placed closer to 25 cmas the focal length of the eye lens cannot bedecreased below a certain minimum limit.

Question 15.
Everyone enjoys the spectacle of a rainbow glimmering against a dark stormy sky. How does sunlight falling on clear drops of rain get broken into the rainbow of colors we see? The same process causes white light to be broken into colors by a clear glass prism or a diamond. Sunlight, considered to be white, actually appears to be a bit yellow because of its mixture of wavelengths, but it does contain all visible wavelengths.
The sequence of colors in rainbows is the same sequence as the colors plotted versus wavelength in Figure below. What this implies is that white light is spread out according to wavelength in a rainbow.
(A) The phenomena that play a role in the formation of rainbow is:
(a) Reflection and refraction of light
(b) Refraction, absorption, dispersion and refraction of light
(c) Dispersion, refraction and reflection of light
(d) Refraction, dispersion, reflection and refraction of light
Answer:
(d) Refraction, dispersion, reflection and refraction of light

Explanation: Rainbow is produced after the rain, by refraction, dispersion, total internal reflection and again refraction process in droplets of water

(B) Select the colours in the correct ascending of wavelength:
(a) Blue, Green, Red
(b) Orange, Green, Red
(c) Blue, Yellow, Green
(d) Orange, Yellow, Green
Answer:

(C) Select the incorrect statements about rainbow:
(I) Rainbow is caused by scattering of sunlight by tiny water droplets, present in the atmosphere.
(II) A rainbow is always formed in a direction opposite to that of the Sun.
(III) The water droplets refract and scatter the incident sunlight, then reflect it internally, and finally refract it again when it comes out of the raindrop.
(IV) Different colours reach the observer’s eye due to the scattering of light and internal reflection.
(a) Both (I) and (II)
(b) Both (II) and (III)
(c) (I), (III) and (IV)
(d) (II), (III) and (IV)
Answer:
(c) (I), (III) and (IV)

Explanation: A rainbow is a natural spectrum appearing in the sky after a rain shower, it is caused by dispersion of sunlight by tiny water droplets, present in the atmosphere which act like small prisms. A rainbow is always formed in a direction opposite to that of the Sun. The tiny droplets of water refract and disperse the incident sunlight, then reflect it internally, and finally refract the light again when it comes out of the raindrop. Due to the dispersion of light and internal reflection, different colours reach the observer’s eye.

(D) A spectrum of light is observed when white light is directed to a prism as:
(a) The different colours in the white light bend away from the normal line at different angles on entering prism.
(b) The different colours in the white
light bend towards the normal line at different angles on entering prism.
(c) The different colours in the white light bend away from the normal at same speed to each other on entering prism.
(d) The different colours in the white light bend towards the normal at same speed to each other on entering prism.
Answer:

(E) The velocity of waves of all colours is same in:
(a) Water
(b) Oxygen
(c) Vacuum
(d) Glass
Answer:

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

Question 16.
Mike and his friends were enjoying a bonfire in their garden. One of his friends noticed that the air above the fire was wavering. He realized that this is because the physical conditions of air are notstationary because of which the apparent position of the object, as seen through the hotair, changes continuously. This phenomenon can also be used to explain several observations around us.
MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers 19
Why do stars appear higher than they actually are?
Answer:
Stars appear higher than they actually are due to the phenomenon of atmospheric refraction. When the starlight enters the earth’s atmosphere, it undergoes refraction continuously before it reaches the earth as the refractive index of the atmosphere changes continuously. The atmosphere bendsstarlight towards the normal due to which the apparent position of thestar is slightly different from its actual position.
MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers 20

Question 17.
In addition to being absorbed or transmitted, electromagnetic radiation can also be reflected or scattered by particles in the atmosphere. Scattering is the redirection of electromagnetic energy by suspended particles in the atmosphere. The Tyndall effect is light scattering by particles in a colloid or in a very fine suspension.
MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers 21
The type and amount of scattering that occurs depends on the size of the particles and the wavelength of the energy. Rayleigh scatter occurs when radiation (light) interacts with molecules and particles in the atmosphere that are smaller in diameter than the wavelength of the incoming radiation. Shorter wavelengths are more readily scattered tha longer wavelengths.
MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers 22
(A) Which of the following will not show Tyndall effect?
(a) Milk
(b) Sugar solution
(c) Smoke
(d) Emulsion
Answer:
(b) Sugar solution

Explanation: Tyndall effect is shown by colloids and suspensions but not shown by true solutions. As sugar solution is a true solution, it will not show Tyndall effect.

(B) Tyndall effect is due to
(a) Refraction of light
(b) Dispersion of light
(c) Absorption of light
(d) Scattering of light
Answer:
(d) Scattering of light

Explanation: Tyndall effect is due to scattering of light by particles present in the atmosphere, such as smoke, fine dust particles and gas molecules.

(C) Which of the following natural phenomena are not due to scattering of light in nature?
(I) Blue colour of sky
(II) Twinkling of stars
(III) Formation of rainbow
(IV) Colour of water in deep sea
(a) Both (I) and (II)
(b) Both (II) and (III)
(c) Both (II) and (IV)
(d) Both (III) and (IV)
Answer:

(D) The table below lists the colour of scattered light for different sizes of scattering particles.
Select the row containing the correct information:
MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers 23
Answer:

(E) The blue colour of the sky is because:
(a) Red colour is scattered more as compared to other colours
(b) Red colour is absorbed more as compared to other colours
(c) Blue colour is scattered more as compared to other colours
(d) Blue colour is absorbed more as compared to other colours
Answer:
(c) Blue colour is scattered more as compared to other colours

Explanation: The molecules of air and other fine particles in the atmosphere have sizesmaller than the wavelength of visible light and these are more effective inscattering Light of shorter wavelengths at the blue end than light of longerwa wavelengths at the red end. Thus, when sunlight passes through the atmosphere, the fine particles in air scatter the blue colour (shorter wavelengths) more strongly than red and the sky appears blue to us as the scattered blue light entersour eyes.

Very Short Answer Type Questions

Question 1.
What would have been the colour of sky if the earth had no atmosphere?
Answer:

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

Question 2.
Why do stars appear higher than their actual position?
Answer:
Stars appear higher than their actual position as starlight undergoes refraction continuously on entering earth’s atmosphere and bends towards the normal.

Question 3.
On the basis of which observation did Newton conclude that sunlight is made up of seven colours?
Answer:

Question 4.
How does the refractive index of earth’s atmosphere vary with height?
Answer:

Question 5.
Why is a small amount of sodium thiosulphate added to water in tank in the activity to understand reddish appearance of sun at sunrise and sunset?
Answer:
Sodium thiosulphate is added to water in the tank for precipitating minute colloidal sulphur particles which scatter short wavelengths of Light.

Question 6.
State one effect produced by the scattering of light by the atmosphere?
Answer:
There are two effects produced due to scattering of light in the atmosphere: Tyndall effect and appearance of the blue colour of the sky.

Related Theory
When light moves from one medium to another, the light scatters in different directions due to change in the medium. This is called scattering of light. When tiny particles of dust come in front of light and leads to its scattering, this is called Tyndall effect. We can see these tiny dust particles in the scattered light.

When the light from stars enters the atmosphere, the light with smaller wavelengths gets easily scattered, while lights with longer wavelength do not scatter much and hence travels straight. This gives red colour to the sky during sunrise and sunset.

On the other hand, the shorter wavelengths scatter in the sky and give the sky its usual blue colour.

Question 7.
An astronaut in space finds sky to be dark. Explain reason for this observation. [Diksha]
Answer:

MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers

Question 8.
What is a rainbow? Draw a labelled diagram to show the formation of a rainbow.
Answer:
Rainbow: A rainbow is a natural spectrum formed in the sky after a rain shower due to the dispersion of sunlight by the tiny droplets of water present in the atmosphere. The tiny droplets of water act like small prisms which refract and disperse the incident sunlight, then reflect the light internally and finally refract it again when it comes out of the raindrop. Different colours reach the observer’s eyes due to the dispersion of light and internal reflection.
MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers 24

Question 9.
Why does the sun appear white at noon?
Answer:

MCQ Questions for Class 10 Science with Answers

Class 10 Science Physics MCQ:

MCQ Questions for Class 6 Science Chapter 4 Sorting Materials Into Groups with Answers

Sorting Materials Into Groups Class 6 MCQ Online Test With Answers Questions

Check the below NCERT MCQ Questions for Class 6 Science Chapter 4 Sorting Materials Into Groups with Answers Pdf free download. MCQ Questions for Class 6 Science with Answers were prepared based on the latest exam pattern. We have provided Sorting Materials Into Groups Class 6 Science MCQs Questions with Answers to help students understand the concept very well. https://ncertmcq.com/mcq-questions-for-class-6-science-with-answers/

You can refer to NCERT Solutions for Class 6 Science Chapter 4 Sorting Materials Into Groups to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Class 6 Science Chapter 4 MCQ With Answers

Science Class 6 Chapter 4 MCQs On Sorting Materials Into Groups

Choose the correct option in the following questions:

Class 6 Science Chapter 4 MCQ Question 1.
What makes the basis of sorting materials into groups?
(a) Similarities in their properties
(b) Differences in their properties
(c) Both similarities and differences in their properties
(d) All of these

Answer

Answer: (c) Both similarities and differences in their properties
Explanation:
Materials are grouped on the basis of similarities and dissimilarities.

MCQ Questions For Class 6 Science Chapter 4 Question 2.
Which one will show a metallic lustre?
(a) Any surface of a metal
(b) Freshly cut surface of a metal
(c) Freshly cut surface of non-metal
(d) Surfaces of all materials

Answer

Answer: (b) Freshly cut surface of a metal
Explanation:
Metals when cut, their freshly cut surface has shining.

Sorting Materials Into Groups Class 6 MCQ Question 3.
An oily thin paper sheet will be
(a) transparent
(b) translucent
(c) opaque
(d) cannot be predicted

Answer

Answer: (b) translucent
Explanation:
Only a part of light passes through it.

Sorting Materials Into Groups Class 6 Quiz Question 4.
Purpose of sorting material into groups is
(a) to rtudy their properties
(b) convenience
(c) both (a) and (b)
(d) inconvenience

Answer

Answer: (c) both (a) and (b)
Explanation:
Materials are grouped for our convenience and to study their properties.

Sorting Materials Into Groups MCQ Question 5.
Which is a set of transparent materials?
(a) Glass and air
(b) Water and glass
(c) Water and air
(d) All of these

Answer

Answer: (d) All of these
Explanation:
Glass, air and water, all are transparent.

Ncert Class 6 Science Chapter 4 MCQ Question 6.
Choose the opaque object from the following:
(a) Charcoal
(b) Air
(c) Glass
(d) Water

Answer

Answer: (a) Charcoal
Explanation:
Except charcoal, all the three will allow the light to pass.

Class 6 Science Chapter 4 MCQ With Answers Question 7.
Which one of the following is not soluble in water?
(a) Turmeric powder
(b) Common salt
(c) Alum
(d) All are soluble

Answer

Answer: (a) Turmeric powder
Explanation:
Only turmeric powder is not soluble in water.

Sorting Materials Into Groups Class 6 MCQ With Answers Question 8.
Which object shines?
(a) Plastic toy
(b) Cotton shirt
(c) Steel spoon
(d) Stone piece

Answer

Answer: (c) Steel spoon
Explanation:
Steel spoon is a metallic object while all others are non-metals.

MCQ On Sorting Materials Into Groups Question 9.
Which of the following has reddish brown colour?
(a) Gold
(b) Copper
(c) Iron
(d) Brass

Answer

Answer: (c) Iron
Explanation:
Iron has reddish brown colour.

Class 6 Science Ch 4 MCQ Question 10.
Which one of the following is insoluble in water?
(a) Alcohol
(b) Sodium chloride
(c) Coconut oil
(d) Sugar

Answer

Answer: (c) Coconut oil
Explanation:
Coconut oil is insoluble in water.

Match the following items given in Column A with that in Column B:

Column A Column B
(a) Glass, air (i) Floats on water
(b) Iron sheet and cardboard (ii) Translucent
(c) Oily paper sheet (iii) Metallic lustre
(d) Sugar and salt (iv) Transparent
(e) Gold and silver (v) Opaque
(f) Wax (vi) Soluble in water
Answer

Answer:

Column A Column B
(a) Glass, air (iv) Transparent
(b) Iron sheet and cardboard (v) Opaque
(c) Oily paper sheet (ii) Translucent
(d) Sugar and salt (vi) Soluble in water
(e) Gold and silver (iii) Metallic lustre
(f) Wax (i) Floats on water

Fill in the blanks with appropriate words:

1. Grouping of things is done for ………….. .

Answer

Answer: convenience

2. Classification is done on the basis of some ……………. and ………… .

Answer

Answer: Similarities, differences

3. A thing can be made of different ……………. .

Answer

Answer: materials

4. Different materials can be used to make ……………. .

Answer

Answer: same thing

5. Mustard oil is ……………….. in water.

Answer

Answer: immiscible

6. A sugar syrup is a ……………….. .

Answer

Answer: solution

7. Blue Vitriol (Neela though) is ……………… in water.

Answer

Answer: soluble

8. Sand is ……………. in water.

Answer

Answer: insoluble

9. Lemon juice is ………………… in water.

Answer

Answer: miscible

10. …………………. substances are those through which we can easily see.

Answer

Answer: Transparent

11. Materials which conduct heat quickly are called …………………….. of heat.

Answer

Answer: conductor

12. Iron is a …………… material.

Answer

Answer: natural

State whether the statements given below are True or False:

1. Grouping is a useful process.

Answer

Answer: True

2. All objects are made up of same kind of materials.

Answer

Answer: False

3. Things can be grouped on the basis of their shape and size.

Answer

Answer: True

4. Different types of materials have different properties.

Answer

Answer: True

5. Same thing can be made from different materials.

Answer

Answer: True

6. Things made of gold and aluminium have no lustre.

Answer

Answer: False

7. Use of a material depends on its properties and the purpose for which it is to be used.

Answer

Answer: True

8. A looking mirror or thing made of metals are smooth to touch.

Answer

Answer: True

9. All materials can be felt by one or more of our senses.

Answer

Answer: True

10. The amount of matter in any object is called its weight.

Answer

Answer: False

11. The materials which do not allow light to pass through them are called opaque

Answer

Answer: True

12. The materials which conduct heat very slowly are called non-conductor of heat.

Answer

Answer: False

We hope the given NCERT MCQ Questions for Class 6 Science Chapter 4 Sorting Materials Into Groups with Answers Pdf free download will help you. If you have any queries regarding Sorting Materials Into Groups CBSE Class 6 Science MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Class 6 Science MCQ:

MCQ Questions For Class 6 Science Chapter 10 Motion And Measurement Of Distances With Answers

Motion and Measurement of Distances Class 6 MCQ Online Test With Answers Questions

Check the below Online Education NCERT MCQ Questions for Class 6 Science Chapter 10 Motion and Measurement of Distances with Answers Pdf free download. MCQ Questions for Class 6 Science with Answers were prepared based on the latest exam pattern. We have provided Motion and Measurement of Distances Class 6 Science MCQs Questions with Answers to help students understand the concept very well.

You can refer to NCERT Solutions for Class 6 Science Chapter 10 Motion and Measurement of Distances to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Class 6 Science Chapter 10 MCQ With Answers

Science Class 6 Chapter 10 MCQs On Motion and Measurement of Distances

Choose the correct option in the following questions:

Class 6 Science Chapter 10 MCQ Question 1.
Which is a standard unit of measurement?
(a) Angul (finger)
(b) Mutthi (fist)
(c) Step
(d) Inch

Answer

Answer: (d) Inch
Explanation:
All other units vary from person to person

Motion And Measurement Of Distances Class 6 MCQs Question 2.
What is the SI unit of length?
(a) Metre
(b) Centimetre
(c) Kilometre
(d) All of these

Answer

Answer: (a) Metre
Explanation:
All other are multiples of metre.

MCQ Questions For Class 6 Science Chapter 10 Question 3.
4 kilometres are equal to
(a) 4,00,000 metre
(b) 40,000 metre
(c) 4,00p metre
(d) 400 metre

Answer

Answer: (c) 4,00p metre
Explanation:
1 km = 1000 m, 4 km = 4000 m

Motion And Measurement Class 6 MCQ Question 4.
15 cm are equal to
(a) 150 mm
(b) 15 mm
(c) 1.5 mm
(d) 0.15 mm

Answer

Answer: (a) 150 mm
Explanation:
1 cm = 10 mm, 15 cm = 150 mm

Measurement And Motion Class 6 MCQ Question 5.
Which is a correct relationship?
(a) 1 m = 100 cm
(b) 1 cm = 100 mm
(c) 1 km = 100 m
(d) all of these

Answer

Answer: (d) all of these
Explanation: 1 m = 100 cm.

MCQ On Motion And Measurement Of Distances Class 6 Question 6.
In the following figure, the proper way of reading scale is
MCQ On Motion And Measurement Of Distances Class 6
(a) C
(b) B
(c) A
(d) Any way can be choosen

Answer

Answer: (c) A
Explanation:
B and C are incorrect positions.

Motion And Measurement Of Distances Class 6 MCQ With Answers Question 7.
An example of rectilinear motion is
(a) apple falling from a tree
(b) motion of a car on road
(c) a spinning top
(d) both (a) and (b)

Answer

Answer: (d) both (a) and (b)
Explanation:
Apple falling from a tree and motion of a car on road are the examples of rectilinear motion.

Ncert Class 6 Science Chapter 10 MCQ Question 8.
Which is an example of a periodic motion?
(a) Oscillation of a pendulum
(b) Motion of a bus on road
(c) A spinning top
(d) A stone dropped from a certain height

Answer

Answer: (a) Oscillation of a pendulum
Explanation:
Oscillation of a pendulum is an example of periodic motion.

Class 6 Science Ch 10 MCQ Question 9.
What kind of motion is executed by a pendulum of a wall clock?
(a) Oscillatory motion
(b) Vibratory motion
(c) Circular motion
(d) Linear motion

Answer

Answer: (a) Oscillatory motion
Explanation:
The to-and-fro motion of a body along the same path is called oscillatory motion.

Motion And Measurement Of Distances Class 6 MCQ Question 10.
One metre is equal to ………….. millimetre.
(a) 10
(b) 1000
(c) 100
(d) 10000

Answer

Answer: (b) 1000
Explanation:
1 metre = 1000 millimetre.

Match the following items given in Column A with that in Column B:

Column A Column B
(a) Metre (i) Unit used to measure very small distances.
(b) Yard (ii) Unit used to measure large distances.
(c) Hand span (iii) SI unit of length.
(d) LeaSt count (iv) Non-standard unit of length.
(e) Millimetre (v) Standard unit of length.
(f) Kilometre (vi) Apple falling from a tree.
(g) Rest (vii) Motion of the tip of the blade of a fan.
(h) Motion (viii) Motion of a pendulum.
(i) Circular motion (ix)Motion of a top.
(j) Rectilinear motion (x) State of moving objects.
(k) Rotational motion (xi) State of stationary objects.
(l) Periodic motion (xii) Minimum amount that can be measured by a device.
Answer

Answer:

Column A Column B
(a) Metre (iii) SI unit of length.
(b) Yard (v) Standard unit of length.
(c) Hand span (iv) Non-standard unit of length.
(d) LeaSt count (xii) Minimum amount that can be measured by a device.
(e) Millimetre (i) Unit used to measure very small distances.
(f) Kilometre (ii) Unit used to measure large distances.
(g) Rest (xi) State of stationary objects.
(h) Motion (x) State of moving objects.
(i) Circular motion (vii) Motion of the tip of the blade of a fan.
(j) Rectilinear motion (vi) Apple falling from a tree.
(k) Rotational motion (ix)Motion of a top.
(l)Periodic motion (viii) Motion of a pendulum.

Fill in the blanks with appropriate words:

1. Striker in the game of carroms moves in a …………. .

Answer

Answer: straight line

2. Powerful shot by a batsman makes the ball move in ………….. motion.

Answer

Answer: rectilinear

3. Moving ceiling fan is an example of …………… motion.

Answer

Answer: circular

4. Rotational motion is known as ………….. motion also.

Answer

Answer: periodic

5. …………….. motion is also a periodic motion.

Answer

Answer: Oscillatory

6. Invention of…………. made great change in modes of transport.

Answer

Answer: wheel

7. Measurement means the comparison of an ………………….. quantity with some ……….. quantity of the same kind.

Answer

Answer: unknown, known

8. It was the …………………. who developed the ‘foot’ as their unit of length.

Answer

Answer: Greeks

9. In 1790, the French created a standard unit of measurement called the ……….. system.

Answer

Answer: metric

10. System of units now used is known as ……………… system.

Answer

Answer: S.I.

11. Each metre is decided into 100 equal divisions, called ……………. .

Answer

Answer: centimetre

12. Each centimetre has ………………. equal divisions called millimetre.

Answer

Answer: ten

13. Motion is the change in …………….. of an object.

Answer

Answer: position

14. Motion of a branch of tree is …………….. motion.

Answer

Answer: periodic

15. A ball rolling on ground executes a rectilinear motion as well as ……………. motion.

Answer

Answer: rotational

State whether the statements given below are True or False:

1. Swinging of our arms or legs are periodic motions.

Answer

Answer: False

2. Beating of our heart is non-periodic motion.

Answer

Answer: True

3. Periodic motion helps us to measure time.

Answer

Answer: True

4. In a circular motion; the objects or any of their parts move in a circular path.

Answer

Answer: True

5. Motion of second’s hand of a clock is rectilinear.

Answer

Answer: False

6. SI unit of length is ‘Foot’.

Answer

Answer: False

7. For measuring large distances metre is not a convenient unit.

Answer

Answer: True

8. Motion of a vehicle on a straight road is a rectilinear motion.

Answer

Answer: True

9. Marchpast of soldiers in a parade is a periodic motion.

Answer

Answer: False

10. Motion of second’s hand in a clock is a circular motion.

Answer

Answer: True

11. In rotational motion whole body moves about an axis.

Answer

Answer: True

12. The result of a measurement is expressed in two parts.

Answer

Answer: True

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MCQ Questions for Class 11 Physics Chapter 4 Motion in a Plane with Answers

Motion in a Plane Class 11 MCQ Online Test With Answers Questions

Check the below NCERT MCQ Questions for Class 11 Physics Chapter 4 Motion in a Plane with Answers Pdf free download. MCQ Questions for Class 11 Physics with Answers were prepared based on the latest exam pattern. We have provided Motion in a Plane Class 11 Physics MCQs Questions with Answers to help students understand the concept very well.

Class 9 Physics Chapter 4 MCQ With Answers

Physics Class 9 Chapter 4 MCQs On Motion in a Plane

Motion In A Plane Class 11 MCQ Question 1.
The angular velocity depends upon the rate of change of the?
(a) Angular acceleration
(b) Angular Distance.
(c) Angular Displacement.
(d) torque

Answer

Answer: (c) Angular Displacement.

Class 11 Physics Chapter 4 MCQ Question 2.
A small body attached at the end of an inextensible string completes a vertical circle, then its
(a) angular momentum remains constant
(b) linear momentum remains constant
(c) angular velocity remains constant
(d) total mechanical energy remains constant

Answer

Answer: (d) total mechanical energy remains constant

MCQ Questions For Class 11 Physics Chapter 4 Question 3.
A cyclist goes round a circular path of circumference 343 m in s. The angle made by him, with the vertical is
(a) 440
(b) 420
(c) 430
(d) 450

Answer

Answer: (d) 450

Motion In Plane Class 11 MCQ Question 4.
A body makes a displacement of 4 m due East from a point O and then makes displacement of 3 m due North. Its resultant displacement from O
(a) 7 m
(b) 1 m
(c) 5 m
(d) 1 . 2 m

Answer

Answer: (c) 5 m

Class 11 Physics Chapter 4 MCQ With Answers Question 5.
A body is traveling in a circle at constant speed. It
(a) has an inward acceleration
(b) has constant velocity.
(c) has no acceleration
(d) has an outward radial acceleration

Answer

Answer: (a) has an inward acceleration

MCQ On Motion In A Plane Class 11 Question 6.
When a body P moves on a circular path, the centripetal acceleration is
(a) directed inwards from P, to the centre of the circle
(b) directed tangential to the circumference of the circle, at P
(c) directed perpendicular to the planc of the circle, at P
(d) directed outward, perpendicular to the circumference of the circle

Answer

Answer: (a) directed inwards from P, to the centre of the circle

Ch 4 Physics Class 11 MCQ Question 7.
A coin kept on a rotating gramophone disc just begins to slip if its centre is at a distance of 8 cm from the centre of the disc. The angular velocity of the gramophone disc is then doubled. Through what distance, the coin should be shifted towards the centre, so that the coin will just slip?
(a) 2 cm
(b) 6 cm
(c) 16 cm
(d) 4 cm

Answer

Answer: (a) 2 cm

Class 11 Physics Ch 4 MCQ Question 8.
A can filled with water is revolved in a vertical circle of radius 4 metre and the water does not fall down. The time period of revolution will be
(a) 4 sec
(b) 10 sec
(c) 8 sec
(d) 1 sec

Answer

Answer: (a) 4 sec

Chapter 4 Physics Class 11 MCQs Question 9.
When angular velocity changes with respect to time then?
(a) an angular acceleration is produced
(b) a linear acceleration is produced
(c) it constitute a couple
(d) a linear velocity is produced

Answer

Answer: (a) an angular acceleration is produced

Motion In A Plane MCQ Class 11 Question 10.
The total flight requires a time that is?
(a) four times the time necessary to reach the maximum height.
(b) thrice the time necessary to reach the maximum height
(c) equal to the time necessary to reach the maximum height.
(d) twice the time necessary to reach the maximum height

Answer

Answer: (d) twice the time necessary to reach the maximum height

MCQ Questions On Motion In A Plane Class 11 Question 11.
The path followed by a projectile is called its?
(a) Territory
(b) Treasury
(c) Tractor
(d) Trajectory

Answer

Answer: (d) Trajectory

Chapter 4 Physics Class 11 MCQ Question 12.
One radian is defined to be the angle subtended where the arc length S is exactly equal to the?
(a) radius of the circle.
(b) diameter of the circle.
(c) circumference of the circle.
(d) half of radius of the circle.

Answer

Answer: (a) radius of the circle.

MCQ Of Motion In Plane Class 11 Question 13.
A car sometimes overturns while taking a turn. When it overturns, it is
(a) the inner wheel which leaves the ground first
(b) either inner wheel or the outer wheel leaves the ground
(c) both the wheel leave the ground simultaneously
(d) the outer wheel which leaves the ground first

Answer

Answer: (a) the inner wheel which leaves the ground first

MCQ Of Chapter 4 Physics Class 11 Question 14.
A body travels along the circumference of a circle of radius 2 m with a linear velocity of 6 m/s . Then its angular velocity is
(a) 6 rad /s
(b) 3 rad /s
(c) 2 rad / s
(d) 4 rad / s

Answer

Answer: (b) 3 rad /s

Class 11 Motion In A Plane MCQ Question 15.
The centripetal component of acceleration arises when?
(a) The direction of motion is changed.
(b) The direction propagation is changed.
(c) The direction of gravity is changed.
(d) The direction of projectile is changed.

Answer

Answer: (a) The direction of motion is changed.

Question 16.
The word centripetal is derived from two Greek words meaning?
(a) Seeking the situation.
(b) Seeking the centre.
(c) Touching the centre.
(d) Leaving the centre.

Answer

Answer: (b) Seeking the centre.

Question 17.
A car is moving with a speed of 30 m/s on a circular path of radius 500 m. Its speed is increasing at the rate of 2 m/s². The acceleration of the car is
(a) 2 m/s²
(b) 9.8 m/s²
(c) 1.8 m/2
(d) 2.7 m/s²

Answer

Answer: (d) 2.7 m/s²

Question 18.
One radian is equal to?
(a) 57.7o
(b) 53.7o
(c) 59.3o
(d) 57.3o

Answer

Answer: (d) 57.3o

Question 19.
A body is moving along a circle with an increasing speed. It possesses?
(a) centripetal acceleration only (ac)
(b) tangential acceleration only (ar)
(c) both tangential and centripetal acceleration (ar and ac)
(d) No acceleration

Answer

Answer: (c) both tangential and centripetal acceleration (ar and ac)

Question 20.
The path of a particle is given by the expression y = at + bt², where a and b are constants . Y is the displacement at time t. Its velocity at any instant is given by
(a) a + 2bt
(b) zero
(c) 2bt
(d) at

Answer

Answer: (a) a + 2bt

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MCQ Questions for Class 11 Physics Chapter 2 Units and Measurements with Answers

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Class 9 Physics Chapter 2 MCQ With Answers

Physics Class 9 Chapter 2 MCQs On Units and Measurements

Units And Measurements Class 11 MCQ Question 1.
Physical quantities are
(a) quantities such as degrees, radians and steradians
(b) quantities such as length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity
(c) quantities such as pounds, dollars and rupees
(d) quantities such as kilos, pounds and gallons

Answer

Answer: (b) quantities such as length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity

Class 11 Physics Chapter 2 MCQ Question 2.
Which of the following pairs has the same dimensions?
(a) specific heat and latent heat
(b) lmpulse and momentum
(c) surface tension and force
(d) moment of lnertia and torque

Answer

Answer: (b) lmpulse and momentum

Unit And Measurement Class 11 MCQ Question 3.
The dimensions of kinetic energy is
(a) [M 2L2T]
(b) [ML 2T]
(c) [ML 2T-2]
(d) [ML 2T-1]

Answer

Answer: (c) [ML 2T-2]

MCQ Questions For Class 11 Physics Chapter 2 Question 4.
A force F is given by F = at + bt², where t is time. What are the dimensions of a and b?
(a) MLT-1 and MLT0
(b) MLT-3 and ML2T4
(c) MLT-4 and MLT1
(d) MLT-3 and MLT-4

Answer

Answer: (d) MLT-3 and MLT-4

Class 11 Physics Chapter 2 MCQ With Answers Question 5.
The atmospheric pressure is 106 dyne/cm². What is its value in SI unit?
(a) 105 newton/m²
(b) 106 newton/m²
(c) 104 newton/m²
(d) 103 newton/m²

Answer

Answer: (a) 105 newton/m²

Class 11 Physics Ch 2 MCQ Question 6.
In a system of units if force (F), acceleration (A) and time (T) are taken as fundamentals units then the dimensional formula of energy is
(a) FA2T
(b) FAT2
(c) FA2T
(d) FAT

Answer

Answer: (b) FAT2

Ch 2 Physics Class 11 MCQ Question 7.
If force (F), work (W) and velocity (v) are taken as fundamental quantities. What is the dimensional formula of time (T)?
(a) [WFv]
(b) [WFv-1]
(c) [W-1F -1v]
(d) [WF-1v -1]

Answer

Answer: (d) [WF-1v -1]

Physics Class 11 Chapter 2 MCQ Question 8.
The dimensions of kinetic energy is same as that of
(a) force
(b) pressure
(c) work
(d) momentum

Answer

Answer: (c) work

MCQs Of Physics Class 11 Chapter 2 Question 9.
Which of the following groups have different dimensions?
(a) Potential difference, EMF, voltage
(b) Pressure, stress, Youngs modulus
(c) Heat, energy, work done
(d) Dipole moment, electric flux, electric field

Answer

Answer: (d) Dipole moment, electric flux, electric field

MCQ Class 11 Physics Chapter 2 Question 10.
ML-1T -2 is the dimensional formula of
(a) magnetic induction
(b) self-inductance
(c) electric potential
(d) electric field

Answer

Answer: (a) magnetic induction

Units And Measurements MCQ Question 11.
What is the dimensional formula of magnetic field?
(a) MT-2A-1
(b) MT-1A-2
(c) M-1L-2TA-1
(d) M-1LTA-2

Answer

Answer: (a) MT-2A-1

MCQ On Units And Measurements Question 12.
Electron volt is a unit of
(a) charge
(b) potential difference
(c) energy
(d) magnetic force

Answer

Answer: (c) energy

MCQ Questions On Units And Measurements Class 11 Question 13.
The volume of a cube in m³ is equal to the surface area of the cube in m². The volume of the cube is
(a) 64 m³
(b) 216 m³
(c) 512 m³
(d) 196 m³

Answer

Answer: (b) 216 m³

MCQ On Units And Measurements Class 11 Pdf With Answers Question 14.
In SI system the fundamental units are
(a) meter, kilogram, second, ampere, Kelvin, mole and candela
(b) meter, kilogram, second, coulomb, Kelvin, mole and candela
(c) meter, Newton, second, ampere, Kelvin, mole and candela
(d) meter, kilogram, second, ampere, Kelvin, mole and lux

Answer

Answer: (b) meter, kilogram, second, coulomb, Kelvin, mole and candela

Chapter 2 Physics Class 11 MCQ Question 15.
Which one of the following represents the correct dimensions of the coefficient of viscosity?
(a) [ML-1T-2]
(b) [MLT-1]
(c) [ML-1T-1]
(d) [ML-2T-2]

Answer

Answer: (c) [ML-1T-1]

MCQ Of Units And Measurements Class 11 Question 16.
A particle starting from the origin (0, 0) moves in a straight line in the (x, y) plane. Its coordinates at a later time are the path of the particle makes with the x-axis an angle of
(a) 300
(b) 450
(c) 600
(d) 0

Answer

Answer: (c) 600

MCQ Questions For Class 11 Physics Chapter 1 Units And Measurements Question 17.
Resolution is
(a) a measure of the bias in the instrument
(b) None of these
(c) the smallest amount of input signal change that the instrument can detect reliably
(d) a measure of the systematic errors

Answer

Answer: (d) a measure of the systematic errors

Class 11 Units And Measurements MCQ Question 18.
Absolute error of the measurement is
(a) the difference between the individual measurement and the true value of the quantity cubed.
(b) the difference between the individual measurement and the true value of the quantity squared.
(c) the difference between two individual measurements and their mean
(d) the difference between the individual measurement and the true value of the quantity

Answer

Answer: (a) the difference between the individual measurement and the true value of the quantity cubed.

MCQ Physics Class 11 Chapter 2 Question 19.
Which of the following units denotes the dimensions [ML2/Q2], where Q represents the electric charge?
(a) Wb/m²
(b) Henry(H)
(c) H/m²
(d) Weber(Wb)

Answer

Answer: (b) Henry(H)

MCQ Of Chapter 2 Physics Class 11 Question 20.
Light year is a unit of
(a) time
(b) distance
(c) sunlight intensity
(d) mass

Answer

Answer: (b) distance

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Class 11 Physics MCQ:

MCQ Questions for Class 11 Physics Chapter 7 System of Particles and Rotational Motion with Answers

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Physics Class 9 Chapter 7 MCQs On System of Particles and Rotational Motion

System Of Particles And Rotational Motion MCQ Question 1.
A body of M.I. 3 kg m² rotating with an angular velocity 2 rad/s has the same K.E. as a mass of 12 kg moving with a velocity of
(a) 1 m/s
(b) 2 m/s
(c) 4 m/s
(d) 8 m/s

Answer

Answer: (a) 1 m/s

System Of Particles And Rotational Motion Class 11 MCQ Question 2.
A particle performing uniform circular motion has angular momentum L. If its angular frequency is doubled and its kinetic energy halved, then the new angular momentum is
(a) L/2
(b) L/4
(c) 2 L
(d) 4 L

Answer

Answer: (b) L/4

Class 11 Physics Chapter 7 MCQ Question 3.
A thin uniform, circular ring is rolling down an inclined plane of inclination 300 without slipping. Its linear acceleration along the inclined plane will be
(a) g/2
(b) g/3
(c) g/4
(d) 2g/3

Answer

Answer: (a) g/2

Rotational Motion Class 11 MCQ Question 4.
Moment of inertia depends on
(a) Distribution of particles
(b) Mass
(c) Position of axis of rotation
(d) All of these

Answer

Answer: (d) All of these

MCQ Questions For Class 11 Physics Chapter 7 Question 5.
Calculate the M.I. of a thin uniform ring about an axis tangent to the ring and in a plane of the ring, if its M.I. about an axis passing through the centre and perpendicular to plane is 4 kg m².
(a) 12 kg m²
(b) 3 kg m²
(c) 6 kg m²
(d) 9 kg m²

Answer

Answer: (c) 6 kg m²

Chapter 7 Physics Class 11 MCQs Question 6.
If a body is rotating about an axis, passing through its centre of mass then its angular momentum is directed along its
(a) Radius
(b) Tangent
(c) Circumference
(d) Axis of rotation

Answer

Answer: (d) Axis of rotation

MCQ On System Of Particles And Rotational Motion Question 7.
A solid cylinder of mass 20 kg, has length 1 metre and radius 0.5m. then its momentum of inertia in kg m² about its geometrical axis is
(a) 2.5
(b) 5
(c) 1.5
(d) 3

Answer

Answer: (a) 2.5

Ch 7 Physics Class 11 MCQ Question 8.
A particle moves on a circular path with decreasing speed. Choose the correct statement.
(a) Angular momentum remains constant.
(b) Acceleration is towards the centre.
(c) Particle moves on a spiral path with decreasing radius.
(d) The direction of angular momentum remains constant.

Answer

Answer: (d) The direction of angular momentum remains constant.

Class 11 Physics Ch 7 MCQ Question 9.
The M.I. of uniform circular disc about a diameter is I. its M.I. about an axis perpendicular to its plane passing through a point on its rim will be
(a) 4 I
(b) 6 I
(c) 8 I
(d) 9 I

Answer

Answer: (b) 6 I

MCQ On Rotational Motion Class 11 Question 10.
Which is the wrong relation from the following?
(a) t = I a
(b) F = ma
(c) L = I w
(d) I = t a

Answer

Answer: (d) I = t a

Class 11 Physics Chapter 7 MCQ With Answers Question 11.
A solid sphere is rotating in free space. If the radius of the sphere is increased keeping mass same, which one of the following will not be affected?
(a) Moment of inertia
(b) Angular momentum
(c) Angular velocity
(d) Rotational kinetic energy

Answer

Answer: (b) Angular momentum

Class 11 System Of Particles And Rotational Motion MCQ Question 12.
A particle moves on a circular path with decreasing speed. Choose the correct statement.
(a) Angular momentum remains constant.
(b) Acceleration is towards the centre.
(c) Particle moves on a spiral path with decreasing radius.
(d) The direction of angular momentum remains constant.

Answer

Answer: (d) The direction of angular momentum remains constant.

Class 11 Physics System Of Particles And Rotational Motion MCQ Question 13.
A body of M.I. 3 kg m² rotating with an angular velocity 2 rad/s has the same K.E. as a mass of 12 kg moving with a velocity of
(a) 1 m/s
(b) 2 m/s
(c) 4 m/s
(d) 8 m/s

Answer

Answer: (a) 1 m/s

Class 11 Rotational Motion MCQ Question 14.
A hollow cylinder and a solid cylinder having different mass diameter are released from rest simultaneously from the of an inclined plane. Which will reach the bottom first?
(a) solid cylinder
(b) cant be determined without knowing their masses
(c) hollow cylinder
(d) cant be determined without knowing their diameters

Answer

Answer: (a) solid cylinder

MCQ Of Chapter 7 Physics Class 11 Question 15.
Which is the wrong relation from the following?
(a) t = I a
(b) F = ma
(c) L = I w
(d) I = t a

Answer

Answer: (d) I = t a

MCQ Of Rotational Motion Class 11 Question 16.
If I, a and t are the moment of inertia, angular acceleration and torque respectively of a body rotating about any axis with angular velocity w, then
(a) t = Ia
(b) t = Iw
(c) I = tw
(d) a = Iw

Answer

Answer: (a) t = Ia

Chapter 7 Class 11 Physics MCQ Question 17.
A dancer on ice spins faster when she folds here arms. This is due to
(a) Increases in energy and increase in angular momentum
(b) Decrease in friction at the skates
(c) Constant angular momentum and increase in kinetic energy
(d) Increase in energy an decreases in angular momentum

Answer

Answer: (c) Constant angular momentum and increase in kinetic energy

System Of Particles And Rotational Motion MCQ Questions Question 18.
The moment of inertia of a uniform semicircular disc of mass M and radius about a line perpendicular to the plane of the disc through the centre is
(a) (2/5) Mr²
(b) (1/4) Mr power 2
(c) (1/2) Mr²
(d) Mr²

Answer

Answer: (c) (1/2) Mr²

Rotational Motion MCQ With Solutions Question 19.
A particle moves for 20 s with velocity 3 m/s and then moves with velocity 4 m/s for another 20 s and finally moves with velocity 5 m/s for next 20 s. what is the average velocity of the particle?
(a) 3 m/s
(b) 4 m/s
(c) 5 m/s
(d) Zero

Answer

Answer: (b) 4 m/s

Chapter 7 Physics Class 11 MCQ Question 20.
For increasing the angular velocity of an object by 10%, the kinetic energy has to be increased by
(a) 40%
(b) 20%
(c) 10%
(d) 21%

Answer

Answer: (d) 21%

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MCQ Questions for Class 11 Physics Chapter 14 Oscillations with Answers

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Class 9 Physics Chapter 14 MCQ With Answers

Physics Class 9 Chapter 14 MCQs On Oscillations

MCQ On Oscillations Class 11 Chapter 14 Question 1.
In damped oscilation the directions of the restoring force and the resistive force
(a) are the same
(b) are opposite
(c) may be same or opposite
(d) have no relation with each other

Answer

Answer: (c) may be same or opposite

Oscillation MCQ With Solution Pdf Chapter 14 Class 11  Question 2.
The displacement y of a particle executing periodic motion is given by y = 4 cos² (t/2) sin (1000t). This expression may be considered to be a result of superposition of the following number of harmonic motions.
(a) two
(b) three
(c) four
(d) five

Answer

Answer: (b) three

Oscillation MCQ With Solution Chapter 14 Class 11 Question 3.
Spring is pulled down by 2 cm. What is amplitude of motion?
(a) 0 cm
(b) 6 cm
(c) 2 cm
(d) cm

Answer

Answer: (c) 2 cm

Oscillation MCQ Chapter 14 Class 11 Question 4.
One of the two clocks on the earth is controlled by a pendulum and other by a spring. If both the clocks are taken to the moon, then which clock will have the same time – period of the earth?
(a) spring clock
(b) pendulum clock
(c) both
(d) none

Answer

Answer: (a) spring clock

Oscillation MCQ Questions Chapter 14 Class 11 Question 5.
When a particle performing uniform circular motion of radius 10 cm undergoes the SHM, what will be its amplitude?
(a) 10 cm
(b) 5 cm
(c) 2.5 cm
(d) 20 cm

Answer

Answer: (a) 10 cm

Oscillation MCQ With Answers Chapter 14 Class 11 Question 6.
For a magnet of time period T magnetic moment is M, if the magnetic moment becomes one fourth of the initial value, then the time period of oscillation becomes.
(a) Half of initial value
(b) One fourth of initial value
(c) Double of initial value
(d) Four time initial value

Answer

Answer: (c) Double of initial value

Oscillation Class 11 MCQ Chapter 14  Question 7.
Time period of simple pendulum of length l and a place where acceleration due to gravity is g is T. what is the period of a simple pendulum of the same length at a place where the acceleration due to gravity is 1.029 is,
(a) T
(b) 1.02 T
(c) 0.99 T
(d) 1.01 T

Answer

Answer: (c) 0.99 T

MCQ On Oscillation Chapter 14 Class 11 Question 8.
In the case of forced oscillations, which of the following statements is not true?
(a) frequency equals that of external periodic force
(b) amplitude depends upon the damping coefficient
(c) amplitude tends to infinity at resonance
(d) higher the damping coefficient, lower is the amplitude at resonance

Answer

Answer: (c) amplitude tends to infinity at resonance

Question 9.
The motion of a particle executing simple harmonic motion is given by X = 0.01 sin 100p (t + 0.05), where X is in metres ant t in second. The time period in second is
(a) 0.001
(b) 0.02
(c) 0.1
(d) 0.2

Answer

Answer: (b) 0.02

Question 10.
In damped oscilation, the angular frequency of the oscillator
(a) keeps on decreasing
(b) keeps on increasing
(c) emains the same
(d) fluctuates

Answer

Answer: (c) emains the same

Question 11.
The acceleration of particle executing S.H.M. when it is at mean position is
(a) Infinite
(b) Varies
(c) Maximum
(d) Zero

Answer

Answer: (d) Zero

Question 12.
In SHM, graph of which of the following is a straight line?
(a) T.E. against displacement
(b) P.E. against displacement
(c) Acceleration against time
(d) Velocity against displacement

Answer

Answer: (a) T.E. against displacement

Question 13.
The period of thin magnet is 4 sec. if it is divided into two equal halves then the time period of each part will be
(a) 4 sec
(b) 1 sec
(c) 2 sec
(d) 8 sec

Answer

Answer: (c) 2 sec

Question 14.
If the length of seconds pendulum is increased by 2%, how may seconds it will lose per day?
(a) 3427 sec
(b) 3727 sec
(c) 3927 sec
(d) 864 sec

Answer

Answer: (d) 864 sec

Question 15.
Length of a simple pendulum executing simple harmonic motion is increased by 21%. The percentage increase in the time – period of the pendulum of increased length is
(a) 10%
(b) 1%
(c) 21%
(d) 42%

Answer

Answer: (a) 10%

Question 16.
If a simple harmonic oscillator has got a displacement of 0.02 m and acceleration equal to 2.0 ms-2 at any time, the angular frequency of the oscillator is equal to
(a) 10 rad s-1
(b) 1 rad s-1
(c) 100 rad s-1
(d) 1 rad s-1

Answer

Answer: (a) 10 rad s-1

Question 17.
The bob of a simple pendulum is a spherical hollow ball filled with water. A plugged hall near the bottom of the oscillating bob gets suddenly unplugged. During observation, till water is coming out, the time -period of the oscillation would
(a) first decrease and then increase to the original value
(b) first increase and then decrease to the original value
(c) increase towards a saturation value
(d) remain unchanged

Answer

Answer: (b) first increase and then decrease to the original value

Question 18.
The maximum velocity for particle in SHM is 0.16 m/s and maximum acceleration is 0.64 m/s2. The amplitude is
(a) 4 × 10-2 m
(b) 4 × 10-1 m
(c) 4 × 10 m
(d) 4 × 100 m

Answer

Answer: (a) 4 × 10-2 m

Question 19.
The period of a simple harmonic oscillator is 2 sec. The ratio of its maximum velocity and maximum acceleration is
(a) ∏
(b) 1/∏
(c) 2∏
(d) 4

Answer

Answer: (b) 1/∏

Question 20.
If a hole is bored along the diameter of the earth and a stone is dropped into the hole
(a) The stone reaches the centre of the earth and stops there
(b) The stone reaches the other side of the earth and stops there
(c) The stone executes simple harmonic motion about the centre of the earth
(d) The stone reaches the other side of the earth and escapes into space

Answer

Answer: (c) The stone executes simple harmonic motion about the centre of the earth

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