Category: MCQ Questions

Check the below NCERT MCQ Questions for Class 12 English Flamingo Chapter 2 Lost Spring with Answers Pdf free download. MCQ Questions for Class 12 English with Answers were prepared based on the latest exam pattern. We have provided Lost Spring Class 12 English MCQs Questions with Answers to help students understand the concept very well.

MCQ Questions for Class 12 English Flamingo Chapter 2 Lost Spring with Answers

Lost Spring MCQ Chapter 2 Class 12 Question 1.
Mukesh wants to learn to become a motor mechanic by
(a) finding a tutor
(b) going to a garage to learn
(c) by reading books
(d) by joining a school

Answer

Answer: (b) going to a garage to learn

---

The Lost Spring MCQ Chapter 2 Class 12 Question 2.
What bothers the author most about the bangle makers?
(a) the stigma of poverty and caste
(b) the affluence of the landlords
(c) the behaviour of the factory owners
(d) the labour laws

Answer

Answer: (a) the stigma of poverty and caste

---

MCQ Of Lost Spring Chapter 2 Class 12 Question 3.
“One wonders if he has achieved what many have failed to achieve in their lifetime. He has a roof over his head”; these lines were said in reference to the condition of
(a) the elderly woman’s old husband
(b) Mukesh’s father
(c) the bangle factory owner
(d) Mukesh’s elder brother

Answer

Answer: (a) the elderly woman’s old husband

---

Lost Spring Class 12 MCQ Chapter 2 Question 4.
Which of the objects below best serves as a symbol of an Indian woman’s `suhag’?
(a) bindi
(b) sindoor
(c) bangles
(d) henna-dyed hands

Answer

Answer: (c) bangles

---

Lost Spring MCQs Chapter 2 Class 12 Question 5.
Sunny-gold, paddy green, royal blue, pink, purple, every colour born out of the seven colours of the rainbow. What is this a reference to?
(a) clothes
(b) birds
(c) bangles
(d) bindis

Answer

Answer: (c) bangles

---

Lost Spring MCQ Questions Chapter 2 Class 12 Question 6.
What was the profession of Mukesh’s father before he became a bangle-maker?
(a) tailor
(b) carpenter
(c) plumber
(d) Mason

Answer

Answer: (a) tailor

---

Lost Spring MCQ Class 12 Chapter 2 Question 7.
The frail woman in Mukesh’s house is his
(a) mother
(b) elder brother’s wife
(c) wife
(d) niece

Answer

Answer: (b) elder brother’s wife

---

MCQs Of Lost Spring Chapter 2 Class 12 Question 8.
If laws were to be enforced, it would bring about change and relief in the lives of about
(a) ten thousand children
(b) twenty thousand children
(c) hundred children
(d) a thousand children

Answer

Answer: (b) twenty thousand children

---

Class 12 Lost Spring MCQ Chapter 2 Question 9.
Bangle industry flourishes in the town of
(a) Ferozepur
(b) Firozabad
(c) Ferozgarh
(d) Farukhabad

Answer

Answer: (b) Firozabad

---

MCQ On Lost Spring Chapter 2 Class 12 Question 10.
Mukesh belonged to a family of
(a) farmers
(b) rag-pickers
(c) bangle makers
(d) motor mechanics

Answer

Answer: (c) bangle makers

---

Lost Spring MCQ With Answers Chapter 2 Class 12 Question 11.
One day, Saheb was seen by the author, watching some young men playing
(a) cricket
(b) tennis
(c) hockey
(d) soccer

Answer

Answer: (b) tennis

---

MCQ Of The Lost Spring Chapter 2 Class 12 Question 12.
According to the author, rag picking has become, over the years, a
(a) profession
(b) fine art
(c) tradition
(d) culture

Answer

Answer: (b) fine art

---

The Lost Spring Class 12 MCQ Chapter 2  Question 13.
The rag pickers have no identity, but they have
(a) permits
(b) passports
(c) ration cards
(d) licenses

Answer

Answer: (a) permits

---

MCQ Of Lost Spring Class 12 Chapter 2 Question 14.
The colony of ragpickers is situated in
(a) the south of Delhi
(b) Mongolpuri
(c) Jehangirpuri
(d) Seemapuri

Answer

Answer: (d) Seemapuri

---

Class 12 English Lost Spring MCQ Chapter 2 Question 15.
What did the man from Udipi pray for, when he was young?
(a) a pair of trousers
(b) a pair of shoes
(c) a few friends
(d) an opportunity to study in a school

Answer

Answer: (b) a pair of shoes

---

The Lost Spring MCQ Questions Chapter 2 Class 12 Question 16.
One explanation which the author gets about children choosing to remain barefoot is
(a) they have no money
(b) tradition
(c) no matching pairs
(d) like to wear only chappals

Answer

Answer: (b) tradition

---

MCQ Of Chapter Lost Spring Chapter 2 Class 12 Question 17.
‘Is your school ready? Who asked this question?
(a) Saheb’s mother
(b) Saheb’s friends
(c) the author
(d) Saheb

Answer

Answer: (d) Saheb

---

Question 18.
What were Saheb and his family looking for in Delhi?
(a) dollars
(b) rupees
(c) pounds
(d) gold

Answer

Answer: (d) gold

---

Question 19.
Saheb’s home, before Delhi, was in
(a) Bengal
(b) Orissa
(c) Dhaka
(d) Bihar

Answer

Answer: (c) Dhaka

---

Question 20.
’Why do you do this?’ This question was asked by the author to
(a) the bangle sellers
(b) Mahesh
(c) Saheb
(d) Saheb’s mother

Answer

Answer: (c) Saheb

---

Question 21.
What is Mukesh’s dream?
(a) To be a doctor
(b) To be a merchant
(c) To be a rogue
(d) To be a motor- mechanic

Answer

Answer: (d) To be a motor- mechanic

---

Question 22.
What is the means of survival in Seemapuri?
(a) Work
(b) Merchandising
(c) Education
(d) Ragpicking

Answer

Answer: (d) Ragpicking

---

Question 23.
Firozabad is the centre of which industry?
(a) Cotton industry
(b) Furniture industry
(c) Textile industry
(d) Glassblowing industry

Answer

Answer: (d) Glassblowing industry

---

Question 24.
What compels the workers in bangle industry of Firozabad to poverty?
(a) Cast and ancestral profession
(b) Karam theory and society
(c) Bureaucrats and politicians
(d) All of these

Answer

Answer: (d) All of these

---

Question 25.
Who is Mukesh?
(a) Student
(b) Worker
(c) Bangle maker
(d) Ragpicker

Answer

Answer: (c) Bangle maker

---

Question 26.
What makes the working conditions of the children worst in the glass industry?
(a) Dark dingy cells without light and air
(b) Dazzling and sparking of welding light
(c) High temperature
(d) All of these

Answer

Answer: (d) All of these

---

Question 27.
Who employs the local families of Firozabad?
(a) Bureaucrats
(b) Merchants
(c) Politicians
(d) The glass blowing industry

Answer

Answer: (d) The glass blowing industry

---

Question 28.
What efforts can help Mukesh materialise his dream of becoming a car driver?
(a) Hard work
(b) Going to garage
(c) Guidance of his owner
(d) All these

Answer

Answer: (d) All these

---

Question 29.
Why did Saheb leave Dhaka?
(a) Because of lack of resources
(b) Because of lack of enough food
(c) Because of friends
(d) Because of parents

Answer

Answer: (b) Because of lack of enough food

---

Question 30.
What forced Saheb to be a ragpicker?
(a) Hard work
(b) Destiny
(c) People around him
(d) Acute poverty

Answer

Answer: (d) Acute poverty

---

Question 31.
Why did Saheb go through garbage dumps?
(a) To find a silver coin
(b) A rupee
(c) A ten rupee note
(d) All of these

Answer

Answer: (d) All of these

---

Question 32.
What does the title ‘Lost Spring’ symbolise?
(a) Lost blooming childhood
(b) Autumn season
(c) Lost money
(d) Lost age

Answer

Answer: (a) Lost blooming childhood

---

Question 33.
What do the boys appear like to the author in the story?
(a) Morning crows
(b) Evening crows
(c) Morning birds
(d) Evening Birds

Answer

Answer: (c) Morning birds

---

Question 34.
Where was Saheb employed?
(a) At a tea stall in Seemapuri
(b) At a saree shop
(c) At a jewellery shop
(d) At a sweet shop

Answer

Answer: (a) At a tea stall in Seemapuri

---

Question 35.
Why did Saheb -e- Alam not go to school?
(a) Not interested
(b) Had no money to pay fees
(c) Wanted to go for movie
(d) Wanted to earn money

Answer

Answer: (b) Had no money to pay fees

---

Question 36.
What was Saheb looking for?
(a) Eggs
(b) Gold
(c) Coins
(d) Toys

Answer

Answer: (b) Gold

---

Question 37.
According to the author what was garbage for the children ?
(a) Means of entertainment
(b) Means of timepass
(c) Means of playing
(d) A wonder

Answer

Answer: (d) A wonder

---

Question 38.
What forces the children to live a life of exploitation?
(a) Greed
(b) Extreme Poverty
(c) Peers
(d) Parents

Answer

Answer: (b) Extreme Poverty

---

Question 39.
What does the author analyze in the story?
(a)Rich people
(b) Garbage
(c) Poor children and their exploitation
(d) Her works

Answer

Answer: (c) Poor children and their exploitation

---

Question 40.
Who is the author of Lost Spring?
(a) James Bond
(b) Arundhati Roy
(c) Sudha Murthy
(d) Anees Jung

Answer

Answer: (d) Anees Jung

---

Question 41.
What change did Anees Jung see in Saheb when she saw him standing by the gate of the neighbourhood club?
(a) As if lost his freedom
(b) Lost ownership
(c) Lost joy
(d) All of these

Answer

Answer: (d) All of these

---

Question 42.
What is the metaphorical symbol of Seemapuri in the lesson?
(a) Poverty
(b) Exploitation
(c) Enjoyment
(d) A little hell

Answer

Answer: (d) A little hell

---

Question 43.
How is Mukesh’s attitude different from that of his family?
(a) Being daring, firm and clear
(b) Being a fighter
(c) Being a coward
(d) Not clear

Answer

Answer: (a) Being daring, firm and clear

---

Question 44.
The city of Firozabad is famous for what?
(a) For casteism
(b) For ragpickers
(c) For poverty
(d) For bangles

Answer

Answer: (d) For bangles

---

Question 45.
What are the reasons for the migration of people from villages to city in the lesson?
(a) Sweeping of houses and fields by storms
(b) No money
(c) Education and unemployment
(d) Safety

Answer

Answer: (a) Sweeping of houses and fields by storms

---

We hope the given NCERT MCQ Questions for Class 12 English Flamingo Chapter 2 Lost Spring with Answers Pdf free download will help you. If you have any queries regarding CBSE Class 12 English Lost Spring MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 12 Geography Chapter 3 Human Development with Answers Pdf free download. MCQ Questions for Class 12 Geography with Answers were prepared based on the latest exam pattern. We have provided Human Development Class 12 Geography MCQs Questions with Answers to help students understand the concept very well.

Human Development Class 12 MCQs Questions with Answers

Class 12 Geography Chapter 3 Human Development MCQ Questions Question 1.
When was the first Human Development Report published by the UNDP?
(A) 1970
(B) 1980
(C) 1990
(D) 1995

Answer

Answer: (C) 1990

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Human Development Class 12 MCQ Questions Question 2.
What is the average HDI value of India?
(A) 0.802
(B) 0.702
(C) 0.554
(D) 0.502

Answer

Answer: (C) 0.554

---

Human Development MCQ Question 3.
India has per capita income on prevailing prices:
(A) ₹ 15,813
(B) ₹ 17,813
(C) ₹ 18,813
(D) ₹ 20,813

Answer

Answer: (D) ₹ 20,813

---

Human Development Class 12 MCQ Question 4.
Which state has the highest percentage of people below the poverty line?
(A) Bihar
(B) Odisha
(C) Andhra Pradesh
(D) Assam

Answer

Answer: (B) Odisha

---

MCQs Of Human Development Class 12 Question 5.
The infant mortality rate in India per thousand is:
(A) 50
(B) 60
(C) 47
(D) 80

Answer

Answer: (C) 47

---

Class 12 Geography Chapter 3 Human Development MCQ Question 6.
In India, the death rate per thousand is:
(A) 6.55
(B) 8.10
(C) 7.48
(D) 9.11

Answer

Answer: (C) 7.48

---

MCQ Of Human Development Class 12 Question 7.
Which state has the highest literacy rate?
(A) Goa
(B) Kerala
(C) Miwram
(D) Maharashtra

Answer

Answer: (B) Kerala

---

MCQ Questions For Class 12 Geography Chapter 3 Question 8.
Which state has the lowest HDI value?
(A) Rajasthan
(B) Bihar
(C) Assam
(D) Madhya Pradesh

Answer

Answer: (B) Bihar

---

Ch 3 Human Development Class 12 MCQ Questions Question 9.
Who Is the author of the book ‘Small is beautiful’?
(A) Maithus
(B) Mahatma Gandhi
(C) Schumacher
(D) Brundtland

Answer

Answer: (C) Schumacher

---

Human Development MCQ Questions Question 10.
Which one of the following is India’s rank in terms of Human Development Index among the countries of the world in 2005?
(A) 126
(B) 127
(C) 128
(D) 129

Answer

Answer: (A) 126

---

MCQ On Human Development Class 12 Question 11.
Which one of the following states of India has the highest rank in the Human Development Index?
(A) Tamil Nadu
(B) Punjab
(C) Kerala
(D) Haryana.

Answer

Answer: (C) Kerala

---

Human Development Chapter 3 Class 12 MCQ Questions Question 12.
Which one of the following states of India has the lowest female literacy?
(A) Jammu and Kashmir
(B) Arunachal Pradesh
(C) Jharkhand
(D) Bihar.

Answer

Answer: (D) Bihar

---

Class 12 Geography Human Development MCQ Question 13.
Which one of the following states of India has the lowest female child sex ratio 0-6 years?
(A) Gujarat
(B) Haryana
(C) Punjab
(D) Himachal Pradesh.

Answer

Answer: (B) Haryana

---

Human Development MCQ Class 12 Question 14.
Which one of the following Union Territories of India has the highest literacy rate?
(A) Lakshadweep
(B) Chandigarh
(C) Daman and Diu
(D) Andaman and the Nicobar Islands.

Answer

Answer: (A) Lakshadweep

---

We hope the given NCERT MCQ Questions for Class 12 Geography Chapter 3 Human Development with Answers Pdf free download will help you. If you have any queries regarding CBSE Class 12 Geography Human Development MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 12 Chemistry Chapter 1 The Solid State with Answers Pdf free download. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. We have provided The Solid State Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well.

The Solid State Class 12 MCQs Questions with Answers

Solid State MCQ Question 1.
Which one of the following is non-crystalline or amorphous?
(a) Diamond
(b) Graphite
(c) Glass
(d) Common Salt

Answer

Answer: (c) Glass

---

Solid State Class 12 MCQ Question 2.
NaCl typecrystal (with coordination no. 6 : 6) can be converted into CsCl type crystal (with coordination no. 8 : 8) by applying
(a) high temperature
(b) high pressure
(c) high temperature and high pressure
(d) low temperature and low pressure

Answer

Answer: (b) high pressure

---

Solid State MCQs Class 12 Question 3.
How many chloride ions are surrounding sodium ion in sodium chloride crystal ?
(a) 4
(b) 8
(c) 6
(d) 12

Answer

Answer: (c) 6

---

Class 12 Chemistry Chapter 1 MCQ Question 4.
In NaCl structure
(a) all octahedral and tetrahedral sites are occupied
(b) only octahedral sites are occupied
(c) only tetrahedral sites are occupied
(d) neither octahedral nor tetrahedral sites are occupied

Answer

Answer: (b) only octahedral sites are occupied

---

Class 12 Chemistry Chapter 1 MCQs Question 5.
In Zinc blende structure
(a) zinc ions occupy half of the tetrahedral sites
(b) each Zn^2- ion is surrounded by six sulphide ions
(c) each S^2- ion is surrounded by six Zn²⁺ ions
(d) it has fee structure

Answer

Answer: (c) each S^2- ion is surrounded by six Zn²⁺ ions

---

Solid State MCQ Questions For Class 12 Question 6.
A unit cell of BaCl₂ (fluorite structure) is made up of
(a) four Ba²⁺ ions and four Cl^– ions
(b) four Ba^2- ions and eight Cl^– ions
(c) eight Ba² ions and four Cl^– ions
(d) four Ba² ions and six Cl^– ions

Answer

Answer: (b) four Ba^2- ions and eight Cl^– ions

---

Class 12 Chemistry MCQ Chapter 1 Question 7.
Alkali halids do not show Frenkel defect because
(a) cations and anions have almost equal size
(b) there is a large difference in size of cations and anions
(c) cations and anions have low coordination number
(d) anions cannot be accommodated in voids

Answer

Answer: (a) cations and anions have almost equal size

---

MCQ On Solid State Class 12 Question 8.
The coordination number of Y will be in the XY types of crystal:
(a) 6
(b) 8
(c) 12
(d) 4

Answer

Answer: (a) 6

---

Solid State Chemistry Class 12 MCQ Question 9.
The fraction of the total volume occupied by the atoms present in a simple cube is
(a) \(\frac{π}{4}\)
(b) \(\frac{π}{6}\)
(c) \(\frac{π}{3√2}\)
(d) \(\frac{π}{4√2}\)

Answer

Answer: (b) \(\frac{π}{6}\)

---

Chemistry Class 12 Chapter 1 MCQ Question 10.
Edge length of unit cell of chromium metal is 287 pm with bcc arrangement. The atomic radius is of the order
(a) 287 pm
(b) 574 pm
(c) 124.27 pm
(d) 143.5 pm

Answer

Answer: (c) 124.27 pm

---

MCQ Solid State Class 12 Question 11.
The edge length of fee cell is 508 pm. If radius of cation is 110 pm, the radius of anion is
(a) 110 pm
(b) 220 pm
(c) 285 pm
(d) 144 pm

Answer

Answer: (d) 144 pm

---

Chapter 1 Chemistry Class 12 MCQ Question 12.
The density of a metal which crystallises in bcc lattice with unit cell edge length 300 pm and molar mass 50 g mol^-1 will be
(a) 10 g cm^-3
(b) 14.2 g cm^-3
(c) 6.15 g cm^-3
(d) 9.3 2 g cm^-3

Answer

Answer: (c) 6.15 g cm^-3

---

Class 12 Solid State MCQ Question 13.
How many lithium atoms are present in a unit cell with edge length 3.5 Å and density 0.53 g cm^-3? (Atomic mass of Li = 6.94):
(a) 2
(b) 1
(c) 4
(d) 6

Answer

Answer: (a) 2

---

MCQ Questions On Solid State With Answers Pdf Question 14.
The distance between Na^– and CL^– ions in NaCl with a density 2.165 g cm^-3 is
(a) 564 pm
(b) 282 pm
(c) 234 pm
(d) 538 pm

Answer

Answer: (b) 282 pm

---

MCQ Of Solid State Class 12 Question 15.
An element with atomic mass 100 has a bcc structure and edge length 400 pm. The density of element is
(a) 10.37 g cm^-3
(b) 5.19 g cm^-3
(c) 7.29 g cm^-3
(d) 2.14 g cm^-3

Answer

Answer: (b) 5.19 g cm^-3

---

Question 16.
Fe₃O₄ (magnetite) is an example of
(a) normal spinel structure
(b) inverse spinel structure
(c) fluoride structure
(d) anti fluorite structure

Answer

Answer: (b) inverse spinel structure

---

Question 17.
Which of the following crystals does not exhibit Frenkel defect?
(a) AgBr
(b) AgCl
(c) KBr
(d) ZnS

Answer

Answer: (c) KBr

---

Question 18.
What type of stoichiometric defect is shown by ZnS?
(a) Schottky defect
(b) Frenkel defect
(c) Both Frenkel and Schottky defects
(d) Non-stoichiometric defect

Answer

Answer: (b) Frenkel defect

---

Question 19.
Silver halides generally show
(a) Schottky defect
(b) Frenkel defect
(c) Both Frenkel and Schottky defects
(d) cation excess defect

Answer

Answer: (c) Both Frenkel and Schottky defects

---

Question 20.
Which of the following will have metal deficiency defect?
(a) NaCl
(b) FeO
(c) KCl
(d) ZnO

Answer

Answer: (b) FeO

---

Question 21.
In which pair most efficient packing is present?
(a) hep and bcc
(b) hep and ccp
(c) bcc and ccp
(d) bcc and simple cubic cell

Answer

Answer: (b) hep and ccp

---

Question 22.
What is the effect of Frenkel defect on the density of ionic solids?
(a) The density of the crystal increases
(b) The density of the crystal decreases
(c) The density of the crystal remains unchanged
(d) There is no relationship between density of a crystal and defect present in it

Answer

Answer: (c) The density of the crystal remains unchanged

---

Question 23.
In a Schottky defect
(a) an ion moves to interstitial position between the lattice points
(b) electrons are trapped in a lattice site
(c) some lattice sites are vacant
(d) some extra cations are present in interstitial space

Answer

Answer: (c) some lattice sites are vacant

---

Question 24.
To get n-type of semiconductor, germanium should be doped with
(a) gallium
(b) arsenic
(c) aluminium
(d) boron

Answer

Answer: (b) arsenic

---

Question 25.
p-type semiconductors are formed When Si or Ge are doped with
(a) group 14 elements
(b) group 15 elements
(c) group 13 elements
(d)group 18 elements

Answer

Answer: (c) group 13 elements

---

Question 26.
Which of the following conditions favours the existence of a substance in the solid state?
(a) High temperature
(b) Low temperature
(c) High thermal energy
(d) Weak cohesive forces

Answer

Answer: (b) Low temperature

---

We hope the given NCERT MCQ Questions for Class 12 Chemistry Chapter 1 The Solid State with Answers Pdf free download will help you. If you have any queries regarding The Solid State CBSE Class 12 Chemistry MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 12 Geography Chapter 4 Human Settlements with Answers Pdf free download. MCQ Questions for Class 12 Geography with Answers were prepared based on the latest exam pattern. We have provided Human Settlements Class 12 Geography MCQs Questions with Answers to help students understand the concept very well.

Human Settlements Class 12 MCQs Questions with Answers

Human Settlement Class 12 MCQ With Answers Question 1.
Which types of settlements are found in alluvial plains?
(A) Clustered
(B) Semi-clustered
(C) Hamleted
(D) Dispersed

Answer

Answer: (A) Clustered

---

Human Settlement Class 12 MCQ Question 2.
In which valley were Harappa and Mohanjodaro towns located?
(A) Ganga
(B) Narmada
(C) Indus
(D) Brahmaputra

Answer

Answer: (C) Indus

---

Class 12 Geography Chapter 4 Human Settlement MCQ Question 3.
Which is the most ancient town In India?
(A) Hyderabad
(B) Varanasi
(C) Agra
(D) Chennai

Answer

Answer: (B) Varanasi

---

Chapter 4 Human Settlement Class 12 MCQ With Answers Question 4.
Which is a medieval town?
(A) Pataliputra
(B) Delhi
(C) Mumbai
(D) Chandigarh

Answer

Answer: (B) Delhi

---

Human Settlement Class 12 MCQ Questions Question 5.
Which is an administrative town?
(A) Varanasi
(B) Surat
(C) Gandhinagar
(D) Rohtak

Answer

Answer: (C) Gandhinagar

---

Human Settlement Class 12 MCQ Chapter 4 Question 6.
How much percent is the urban population in India?
(A) 18
(B) 20
(C) 25
(D) 31

Answer

Answer: (D) 31

---

MCQ Of Human Settlement Class 12 Question 7.
How many times the urban population has increased during the 20th century?
(A) 5
(B) 7
(C) 11
(D) 15

Answer

Answer: (C) 11

---

Ch 4 Human Settlement Class 12 MCQ Question 8.
How much is the population of a megacity?
(A) 1 Lakh
(B) 5 Lakh
(C) 10 Lakh
(D) 50 Lakh

Answer

Answer: (D) 50 Lakh

---

Human Settlements MCQ Class 12 Question 9.
The number of towns in India is:
(A) 4161
(B) 5161
(C) 6161
(D) 7161

Answer

Answer: (B) 5161

---

Class 12 Human Settlement MCQ Question 10.
How many million towns are there in India (as in 2014)?
(A) 25
(B) 30
(C) 55
(D) 40

Answer

Answer: (C) 55

---

MCQ Questions For Class 12 Geography Chapter 4 Human Settlements Question 11.
Which one of the following towns is not situated along the bank of a river?
(A) Agra
(B) Bhopal
(C) Patna
(D) Kolkata

Answer

Answer: (B) Bhopal

---

Human Settlements MCQ Questions Question 12.
Which one of the following is NOT part of the definition of a town as per the census of India?
(A) Population density of 400 persons per sq km.
(B) Presence of municipality, corporation, etc.
(C) More than 75% of the population engaged in the primary sector
(D) Population size of more than 5,000 persons

Answer

Answer: (C) More than 75% of the population engaged in the primary sector

---

Class 12 Geography Human Settlement MCQ Question 13.
In which one of the following environments does one expect the presence of dispersed rural settlements?
(A) Alluvial plains of Ganga
(B) Arid and semi-arid regions of Rajasthan
(C) Lower valleys of Himalays
(D) Forests and hills in north-east

Answer

Answer: (A) Alluvial plains of Ganga.

---

Class 12 Geography Chapter 4 Human Settlement MCQ Questions Question 14.
Which one of the following groups of cities has been arranged in the sequence of their ranks i.e. 1, 2, 3, and 4 in size?
(A) Greater Mumbai, Bengaluru, Kolkata, Chennai
(B) Delhi, Greater Mumbai, Chennai, Kolkata.
(C) Kolkata, Greater Mumbai, Chennai, Kolkata.
(D) Greater Mumbai, Kolkata, Delhi, Chennai.

Answer

Answer: (D) Greater Mumbai, Kolkata, Delhi, Chennai

---

We hope the given NCERT MCQ Questions for Class 12 Geography Chapter 4 Human Settlements with Answers Pdf free download will help you. If you have any queries regarding CBSE Class 12 Geography Human Settlements MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 12 Chemistry Chapter 2 Solutions with Answers Pdf free download. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. We have provided Solutions Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well.

Solutions Class 12 MCQs Questions with Answers

Solutions Class 12 MCQ Question 1.
If 2 gm of NaOH is present is 200 ml of its solution, its molarity will be
(a) 0.25
(b) 0.5
(c) 5
(d) 10

Answer

Answer: (a) 0.25

---

MCQ On Solutions Class 12 Question 2.
The atmospheric pollution is generally measured in the units of
(a) mass percentage
(b) volume percentage
(c) volume fraction
(d) ppm

Answer

Answer: (d) ppm

---

Solution MCQ Class 12 Question 3.
A 5% solution of cane-sugar (molecular weight = 342) is isotonic with 1% solution of substance A. The molecular weight of X is
(a) 342
(b) 171.2
(c) 68.4
(d) 136.8

Answer

Answer: (c) 68.4

---

Class 12 Chemistry Chapter 2 MCQ Question 4.
234.2 gm of sugar syrup contains 34.2 gm of sugar. What is the molal concentration of the solution.
(a) 0.1
(b) 0.5
(c) 5.5
(d) 55

Answer

Answer: (b) 0.5

---

MCQ Of Chapter 2 Chemistry Class 12 Question 5.
H₂S is a toxic gas used in qualitative analysis. If solubility of H₂S in water at STP is 0.195 m. what is the value of K_H?
(a) 0.0263 bar
(b) 69.16 bar
(c) 192 bar
(d) 282 bar

Answer

Answer: (d) 282 bar

---

Class 12 Chemistry Chapter 2 MCQs Question 6.
Atomic mass is equal to
(a) number of electrons of an atom
(b) sum of the numbers of electrons and protons of an atom
(c) sum of the numbers of neutrons and protons of an atom
(d) none of these

Answer

Answer: (b) sum of the numbers of electrons and protons of an atom

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MCQ Questions For Class 12 Chemistry Chapter 2 Question 7.
Henry’s law constant for molality of methane is benzene at 298 K is 4.27 × 10⁵ mm Hg. The mole fraction of methane is nenzene at 298 K under 760 mm Hg is
(a) 1.78 × 10^-3
(b) 17.43
(c) 0.114
(d) 2.814

Answer

Answer: (a) 1.78 × 10^-3

---

Class 12 Solutions MCQ Question 8.
How much oxygen is dissolved in 100 rnL water at 298 K if partial pressure of oxygen is 0.5 atm and K = 1.4 × 10^-3 mol/L/atm?
(a) 22.4 mg
(b) 22.4 g
(c) 2.24 g
(d) 2.24 mg

Answer

Answer: (d) 2.24 mg

---

MCQ Solutions Class 12 Question 9.
The law which indicates the relation’-hip between solubility of a gas in liquid and pressure rs
(a) Raoult’s law
(b) Henry’s law
(c) Lowering of vapour pressure
(d) Van’t Hoff law

Answer

Answer: (b) Henry’s law

---

MCQ Of Solution Chapter Question 10.
Among the following substances the lowest vapour pressure is exerted by
(a) water
(b) alcohol
(c) ether
(d) mercury

Answer

Answer: (d) mercury

---

MCQ On Solution Chapter Class 12 Question 11.
Vapour pressure of a pure liquid X is 2 atm at 300 K. It is lowered to 1 atm on dissolving 1 gof Y in 20 g of liquid X. If molar mass of X is 200, what is the molar mass of Y?
(a) 20
(b) 50
(c) 100
(d) 200

Answer

Answer: (b) 50

---

Chapter 2 Chemistry Class 12 MCQ Question 12.
Partial pressure of a solution component is directly proportional to its mole fraction. This is known as
(a) Henry’s law
(b) Raoult’s law
(c) Distribution law
(d) Ostawald’s dilution law

Answer

Answer: (b) Raoult’s law

---

Solution Class 12 MCQ Question 13.
3 moles of P and 2 moles of Q are mixed, what will be their total vapour pressure in the solution if their partial vapour pressures are 80 and 60 torr respectively?
(a) 80 torr
(b) 140 torr
(c) 72 torr
(d) 70 torr

Answer

Answer: (c) 72 torr

---

Solutions Chemistry Class 12 MCQ Question 14.
Which of the following solutions shows positive deviation from Raoult’s law?
(a) Acetone + Aniline
(b) Acetone + Ethanol
(c) Water + Nitric acid
(d) Chloroform + Benzene

Answer

Answer: (b) Acetone + Ethanol

---

MCQ Questions On Solutions In Chemistry Class 12 Question 15.
The system that forms maximum boilingazetrope is
(a) Acetone-chloroform
(b) ethanol-acetone
(c) n-hexane-n-heptane
(d) carbon disulphide-acetone

Answer

Answer: (a) Acetone-chloroform

---

Question 16.
A plant cell shrinks when it is kept in a
(a) hypotonic solution
(b) hypertonic solution
(c) isotonic solution
(d) pure water

Answer

Answer: (b) hypertonic solution

---

Question 17.
The relative lowering in vapour pressure is proportional to the ratio of number of
(a) solute molecules to solvent molecules
(b) solvent molecules to solute molecules
(c) solute molecules to the total number of molecules in solution
(d) solvent molecules to the total number of molecules in solution

Answer

Answer: (c) solute molecules to the total number of molecules in solution

---

Question 18.
A solution containing 10.2 g glycerine per litre is isotonic with a 2% solution of glucose. What is the molecular mass of glycerine?
(a) 91.8 g
(b) 1198 g
(c) 83.9 g
(d) 890.3 g

Answer

Answer: (a) 91.8 g

---

Question 19.
What weight of glycerol should be added to 600 g of water in order to lower its freezing point by 10°C ?
(a) 496 g
(b) 297 g
(c) 310 g
(d) 426 g

Answer

Answer: (b) 297 g

---

Question 20.
The osmotic pressure of a solution can be increased by
(a) increasing the volume
(b) increasing the number of solute molecules
(c) decreasing the temperature
(d) removing semipermeable membrane

Answer

Answer: (b) increasing the number of solute molecules

---

Question 21.
Sprinkling of salt helps in clearing the snow covered roads in hills. The phenomenon involved in the process is
(a) lowering in vapour pressure of snow
(b) depression in freezing point of snow
(c) melting of ice due to increase in temperature by putting salt
(d) increase in freezing point of snow

Answer

Answer: (b) depression in freezing point of snow

---

Question 22.
For carrying reverse osmosis for desalination of water the material used for making semipermeable membrane is
(a) potassium nitrate
(b) parchment membrane
(c) cellulose acetate
(d) cell membrane

Answer

Answer: (c) cellulose acetate

---

Question 23.
What will be the degree of dissociation of 0.1 M Mg(NO₃)₂ solution if van’t Hoff factor is 2.74?
(a) 75%
(b) 87%
(c) 100%
(d) 92%

Answer

Answer: (b) 87%

---

Question 24.
Which of the following units is useful in relating concentration of solution with its vapour pressure?
(a) Mole fraction
(b) Parts per million
(c) Mass percentage
(d) Molality

Answer

Answer: (a) Mole fraction

---

Question 25.
At equilibrium the rate of dissociation of a solid solute in a volatile liquid solvent is
(a) less than the rate of crystallisation
(b) greater than the rate of crystallisation
(c) equal to the rate of crystallisation
(d) zero

Answer

Answer: (c) equal to the rate of crystallisation

---

We hope the given NCERT MCQ Questions for Class 12 Chemistry Chapter 2 Solutions with Answers Pdf free download will help you. If you have any queries regarding Solutions CBSE Class 12 Chemistry MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 12 History Chapter 5 Through the Eyes of Travellers: Perceptions of Society with Answers Pdf free download. MCQ Questions for Class 12 History with Answers were prepared based on the latest exam pattern. We have provided Through the Eyes of Travellers Class 12 History MCQs Questions with Answers to help students understand the concept very well.

Through the Eyes of Travellers Class 12 MCQs Questions with Answers

Question 1.
Which of these French travellers came to during 17th century?
(a) Al-Biruni
(b) Ibn-Battuta
(c) Abul Fail
(d) Fra ncois Bernier

Answer

Answer: (d) Francois Bernier

---

Question 2.
Who among the following belonged to Morocco?
(a) Ibn Battuta
(b) Al-Biruni
(c) Francois Bernier
(d) Abdul Samarandi

Answer

Answer: (a) Ibn Battuta

---

Question 3.
Who Wrote ‘Kitab-ul-Hind’?
(a) Callin Mcenzie
(b) Al-Biruni
(c) Abdul Samad Lahori
(d) lbn-Battuta

Answer

Answer: (b) Al-Biruni

---

Question 4.
Islamic Law is known as ________
(a) Shariya
(b) Samr
(c) Ulema
(d) All of these

Answer

Answer: (a) Shariya

---

Question 5.
Ibn Battuta remained in India for ________
years.
(a) 12
(b) 14
(e) 16
(d) 18

Answer

Answer: (a) 12

---

Question 6.
Which of the following cities, according to Ibn-Battut a, was the largest?
(a) Surat
(b) Delhi
(c) Daulatabad
(d) Agra

Answer

Answer: (b) Delhi

---

Question 7.
Who wrote the book, “Travells In The Mughal Empire”?
(a) Francois Bernier
(b) John Marshall
(c) Callin Mcenzie
(d) James Princep

Answer

Answer: (a) Francois Bernier

---

Question 8.
Which among the following was the book written by Al-Biruni?
(a) Rihla
(b) Kitab-ul-Hind
(c) Discovery of India
(d) Arthashastra

Answer

Answer: (d) Kitab-ul-Hind

---

Question 9.
Choose the correct option:
Who founded Delhi as a city full of exciting opportunities?
(a) Jbn-Battuta
(b) Al-Biruni
(c) Francois Bernier
(d) Karl Marx

Answer

Answer: (a) Ibn-Battuta

---

Question 10.
Choose the correct option:
(a) Ibn-Battuta travelled extensively in China.
(b) Al-Biruni found the Indian cities quite populated.
(c) Al-Biruni was greatly influenced by the Indian postal system.
(d) According to Ibn-Battuta. crown ownership of land was quite disasterous for farmers.

Answer

Answer: (d) According to Thn-Battuta, crown ownership of land was quite disasterous for farmers.

---

Question 11.
Consider the following statements.
1. Montesquieu used Bernier’s accounts to develop his idea of oriental despotism.
2. Bernier gave a detailed report on rural society.
3. According to Bernier, crown ownership of land was good for peasants.
4. Bernier onsidered Indian King was the king of beggars.
Which of the given statement is/are correct?
(a) 1, 2, 3, 4
(b) 1, 2, 3
(c) 1, 2, 4
(d) 2, 3, 4

Answer

Answer: (c) 1, 2, 4

---

Question 12.
Consider the following:

1. Al-Biruni	i. Rihla
2. Ibn-Battuta	ii. Kitab-ul-Hind
3. Francois Bernier	iii. Travels in Mughal Empire

Correctly match them.
(a) 1 – (ii), 2 – (i), 3 – (iii)
(b) 1 – (i), 2 – (ii), 3 – (iii)
(c) I – (iii), 2 – (i), 3 – (iii)
(ci) 1 – (ii), 2 – (iii), 3 – (i)

Answer

Answer: (a) 1 – (ii), 2 – (i), 3 – (iii)

---

We hope the given NCERT MCQ Questions for Class 12 History Chapter 5 Through the Eyes of Travellers: Perceptions of Society with Answers Pdf free download will help you. If you have any queries regarding CBSE Class 12 History Through the Eyes of Travellers MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 12 Chemistry Chapter 4 Chemical Kinetics with Answers Pdf free download. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. We have provided Chemical Kinetics Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well.

Chemical Kinetics Class 12 MCQs Questions with Answers

Chemical Kinetics Class 12 MCQ Question 1.
In chemical equation H₂ (g) + I₂ (g) \(\rightleftharpoons\) 2HI (g) the equilibrium constant K_p depends on
(a) total pressure
(b) catalyst used
(c) amount of H₂ and I₂
(d) temperature

Answer

Answer: (b) catalyst used

---

Class 12 Chemistry Chapter 4 MCQ Question 2.
If the rate of a reaction is expressed by, rate = A [A]² [B], the order of reaction will be
(a) 2
(b) 3
(c) 1
(d) 0

Answer

Answer: (b) 3

---

Percent concentration and molarity are the most commonly used solution.

MCQ On Chemical Kinetics Question 3.
In a reaction, 2X → Y, the concentration of X decreases from 0.50 M to 0.38 M in 10 min. What is the rate of reaction in Ms^-1 during this interval ?
(a) 2 × 10^-4
(b) 4 × 10^-2
(c) 2 × 10^-2
(d) 1 × 10^-2

Answer

Answer: (a) 2 × 10^-4

---

MCQ On Chemical Kinetics Class 12 Question 4.
The decomposition of dimethyl ether is a fractional order reaction. The rate is given by rate =k(PCH₃OCH₃)^3/2. If the pressure is measured in bar and time in minutes, then what are the units of rate and rate constant?
(a) bar min^-1, bar² min^-1
(b) bar min^-1, bar^1/2 min^-1
(c) bar^1/2 min^-1, bar² min^-1
(d) bar min^-1, bar^1/2 min^-1

Answer

Answer: (b) bar min^-1, bar^1/2 min^-1

---

Chemical Kinetics Class 12 MCQ Questions Question 5.
A reaction in which reactants (R) are converted into products (P) follows second order kinetics. If concentration of R is increased by four times, what will be the increase in the rate of formation of P?
(a) 9 times
(b) 4 times
(c) 16 times
(d) 8 times

Answer

Answer: (c) 16 times

---

MCQ Of Chemical Kinetics Class 12 Question 6.
Which of the following, is an example of a fractional order reaction?
(a) NH₄NO₂ → N₂ + 2H₂O
(b) NO + O₃ → NO₂ + O₂
(c) 2NO + Br₂ → 2NOBr
(d) CH₃CHO → CH₄ + CO

Answer

Answer: (d) CH₃CHO → CH₄ + CO

---

Chemical Kinetics MCQ Questions And Answers Question 7.
The unit of rate constant for the reaction
2H₂ + 2NO → 2H₂O + N₂
which has rate = K|H₂||NO|², is
(a) mol L^-1 s^-1
(b) s^-1
(c) mol^-2 L² s^-1
(d)mol L^-1

Answer

Answer: (c) mol^-2 L² s^-1

---

MCQ On Chemical Kinetics Class 12 Pdf Question 8.
Fora reaction x + y → z, rate ∝ |X|. What is (i) moleculariiy and (ii) order of reaction?
(a) (i)2, (ii) 1
(b) (i)2,(ii) 2
(c) (i) 1, (ii) 1
(d) (i) 1, (ii) 2

Answer

Answer: (a) (i)2, (ii) 1

---

Chemical Kinetics MCQ Questions Question 9.
For a reaction nx – y → z the rate of reaction becomes twenty seven times when the concentration of X is increased three times. What is the order of the reaction?
(a) 2
(b) 1
(c) 3
(d) 0

Answer

Answer: (c) 3

---

MCQ Of Chapter 4 Chemistry Class 12 Question 10.
The rate constant of a reaction depends upon
(a) temperature of the reaction
(b) extent of the reaction
(c) initial concentration of the reactants
(d) the time of completion of reaction

Answer

Answer: (d) the time of completion of reaction

---

Chemical Kinetics MCQ With Answers Pdf Question 11.
The chemical reaction, 2O₃ → 3O₂ proceeds as
O₃ \(\rightleftharpoons\) O₂ + |O| (fast)
|O| + O₃ → 2O₂ (slow)
The rate law expression will be
(a) Rate = k [O] [O₃]
(b) Rate = k [O₃]² [O₂]^-1
(c) Rate = k [O₃]²
(d) Rate = k [O₂] [O]

Answer

Answer: (b) Rate = k [O₃]² [O₂]^-1

---

Class 12 Chemical Kinetics MCQ Question 12.
The unit of rate and rate constant are same fora
(a) zero order reaction
(b) first order reaction
(c) second order reaction
(d) third order reaction

Answer

Answer: (a) zero order reaction

---

Chapter 4 Chemistry Class 12 MCQs Question 13.
The number of molecules of the reactants taking part in a single step of the reaction is indicative of
(a) order of a reaction
(b) molecuiarity of a reaction
(c) fast step of the mechanism of a reaction
(d) half-life of the reaction

Answer

Answer: (b) molecuiarity of a reaction

---

MCQ Chemical Kinetics Class 12 Question 14.
Fora unimolecular reaction
(a) the order and molecuiarity of the slowest step are equal to one
(b) molecuiarity of the reaction can be zero, one or two
(c) molecuiarity of the reaction can be determined only experimentally
(d) more than one reacting species are involved in one step

Answer

Answer: (a) the order and molecuiarity of the slowest step are equal to one

---

MCQ Questions For Class 12 Chemistry Chapter 4 Question 15.
The overall rate of a reaction is governed by
(a) the rate of fastest intermediate’step
(b) the sum total of the rates of all intermediate steps
(c) the average of the rates of all the intermediate steps
(d) the rate of slowest intermediate step

Answer

Answer: (d) the rate of slowest intermediate step

---

Question 16.
The order of reaction is decided by
(a) temperature
(b) mechanism of reaction as well as relative concentration of reactants
(c) molecularity
(d) pressure

Answer

Answer: (b) mechanism of reaction as well as relative concentration of reactants

---

Question 17.
Rate constant in case of first order reaction is
(a) inversely proportional to the concentration units
(b) independent of concentration units
(c) directly proportional to concentration units
(d) inversely proportional to the square of concentration units

Answer

Answer: (b) independent of concentration units

---

Question 18.
Half life period of a first order reaction is 10 min. What percentage of the reaction will be completed in 100 min?
(a) 25%
(b) 50%
(c) 99.9%
(d) 75%

Answer

Answer: (c) 99.9%

---

Question 19.
In pseudo unimolecular reactions
(a) both the reactants are present in low concentration
(b) both the reactants are present in same concentration
(c) one of the reactant is present in excess
(d) one of the reactant is non-reactive

Answer

Answer: (c) one of the reactant is present in excess

---

Question 20.
A first order reaction takes 40 min for 30% decomposition. What will be t₁₂?
(a) 77.7 min
(b) 52.5 min
(c) 46.2 min
(d) 22.7 min

Answer

Answer: (a) 77.7 min

---

Question 21.
A first order reaction has a rate constant 1.15 × 10^-3s^-1. How long time will 5 g of this reactant take to reduce to 3 g?
(a) 444 s
(b) 400 s
(c) 528 s
(d) 669 s

Answer

Answer: (a) 444 s

---

Question 22.
Radioactive disintegration is an example of
(a) zero order reaction
(b) first order reaction
(c) second order reaction
(d) third order reaction

Answer

Answer: (b) first order reaction

---

Question 23.
A plot of log (a – x) against time t is a straight line. This indicates that the reaction is of
(a) zero order
(b) first order
(c) second order
(d) third order

Answer

Answer: (b) first order

---

Question 24.
Rate of which reaction increases with temperature?
(a) Exothermic reaction
(b) Endothermic reaction
(c) (a) and (b) both
(d) None of the above

Answer

Answer: (c) (a) and (b) both

---

Question 25.
The activation energy in a chemical reaction is defined as
(a) the difference in energies of reactants and products
(b) the sum of energies of reactants and products
(c) the difference in energy of intermediate complex with the average energy of reactants and products
(d) the difference in energy of intermediate complex and the average energy of reactants

Answer

Answer: (d) the difference in energy of intermediate complex and the average energy of reactants

---

We hope the given NCERT MCQ Questions for Class 12 Chemistry Chapter 4 Chemical Kinetics with Answers Pdf free download will help you. If you have any queries regarding Chemical Kinetics CBSE Class 12 Chemistry MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements with Answers Pdf free download. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. We have provided General Principles and Processes of Isolation of Elements Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well.

General Principles and Processes of Isolation of Elements Class 12 MCQs Questions with Answers

Metallurgy MCQ Questions Class 12 Question 1.
Concentration of sulphide ore is done by
(a) froth flotation process
(b) electrolysis
(c) roasting
(d) None of these

Answer

Answer: (a) froth flotation process

---

MCQ On Metallurgy Class 12 Question 2.
Malachite is an ore of
(a) iron
(b) copper
(c) zinc
(d) Sliver

Answer

Answer: (b) copper

---

General Principles And Processes Of Isolation Of Elements MCQ Question 3.
Formula of copper pyrite is
(a)Cu₂S
(b) CuFeS
(c) CuFeS₂
(d) Cu₂Fe₂S₂

Answer

Answer: (c) CuFeS₂

---

MCQ On General Principles And Processes Of Isolation Of Elements Question 4.
Ore of aluminium is
(a) bauxite
(b) hematite
(c) dolomite
(d) None of these

Answer

Answer: (a) bauxite

---

MCQ On Metallurgy Class 12 Pdf Question 5.
Removal of the unwanted materials like sand, clays, etc. from the ore is known as ………., …….. or ……….
(a) concentration, dressing, benefaction
(b) separation, refining, gangue
(c) magnetic separation, purification, gangue
(d) washing, refining, amalgamation

Answer

Answer: (a) concentration, dressing, benefaction

---

Metallurgy Class 12 MCQ Question 6.
For which of the following ores froth floatation method is used for concentration?
(a) Haematite
(b) Zinc blende
(c) Magnetite
(d) Camallite

Answer

Answer: (b) Zinc blended

---

Class 12 Chemistry Chapter 6 MCQ Question 7.
The powdered ore is agitated with water or washed with running stream of water. The heavy ore particles and lighter impurities are separated. This method of concentration is known as
(a) metallurgy
(b) leaching
(c) froth floatation process
(d) gravity separation

Answer

Answer: (d) gravity separation

---

General Principles And Processes Of Isolation Of Elements MCQs Pdf Question 8.
The oil used as frothing agent in froth floatation process is
(a) coconut oil
(b) castor oil
(c) palmitic oil
(d) pine oil

Answer

Answer: (d) pine oil

---

General Principles And Processes Of Isolation Of Elements Class 12 MCQ Question 9.
Which of the following metals is not extracted by leaching?
(a) Aluminium
(b) Mercury
(c) Silver
(d) Gold

Answer

Answer: (b) Mercury

---

Metallurgy Quiz Class 12 Question 10.
Sulphide ore of zinc/copper is concentrated by
(a) floatation process
(b) electromagnetic process
(c) gravity separation
(d) distillation

Answer

Answer: (a) floatation process

---

Class 12 Chemistry Chapter 6 MCQs Question 11.
Which of the following ores is concentrated by chemical leaching method?
(a) Cinnabar
(b) Argentite
(c) Copper pyrites
(d) Galena

Answer

Answer: (b) Argentite

---

MCQ Questions For Class 12 Chemistry Chapter 6 Question 12.
How do we separate two sulphide ores by froth floatation method?
(a) By using excess of pine oil
(b) By adjusting proportion of oil to water or using depressant.
(c) By using some solvent in which one of the sulphides is soluble
(d) By using collectors and froth stabilisers like xanthates

Answer

Answer: (b) By adjusting proportion of oil to water or using depressant.

---

MCQ Of Metallurgy Class 12 Question 13.
Common impurities present in bauxite are
(a) CuO
(b) ZnO
(c) CaO
(d) SiO₂

Answer

Answer: (d) SiO₂

---

Question 14.
An ore of tin containing FeCrO₄ is concentrated by
(a) gravity separation
(b) magnetic separation
(c) froth floatation
(d) leaching

Answer

Answer: (b) magnetic separation

---

Question 15.
Which of the following ores cannot be concentrated by magnetic separation?
(a) Haematite
(b) Malachite
(c) Magnetite
(d) Siderite

Answer

Answer: (b) Malachite

---

Question 16.
The significance of leaching in the extraction of aluminium is
(a) it helps removing the impurities like SiO₂, Fe₂O₃ etc. from the bauxite ore
(b) it converts the ore into oxide
(c) it reduces melting point of the ore
(d) it eliminates water from bauxite

Answer

Answer: (a) it helps removing the impurities like SiO₂, Fe₂O₃ etc. from the bauxite ore

---

Question 17.
Which of the following metals is extracted using a silica lined convertor?
(a) Mg
(b) Al
(c) Cu
(d) Zn

Answer

Answer: (c) Cu

---

Question 18.
Which of the following sulphides when heated strongly in air gives the corresponding metal without undergoing separate reduction of oxide?
(a) Cu₂S
(b) FeS
(c) HgS
(d) ZnS

Answer

Answer: (c) HgS

---

Question 19.
Which of the following metals cannot be obtained by reduction of its metal oxide bv aluminium ?
(a) Cr
(b) Mn
(c) Fe
(d) Mg

Answer

Answer: (d) Mg

---

Question 20.
Heating pyrites to remove sulphur is called
(a) smelting
(b) calcination
(c) liquation
(d) roasting

Answer

Answer: (d) roasting

---

Question 21.
Impurities of sulphur, silicon and phosphorus can be removed from cast iron by adding
(a) carbon which reduces the impurities
(b) water which dissolves the impurities
(c) limestone which changes impurities into oxides and pass into slag
(d) iron oxide which reacts with impurities by forming slag

Answer

Answer: (c) limestone which changes impurities into oxides and pass into slag

---

Question 22.
In metallurgical process, aluminium acts as
(a) an oxidising agent
(b) a reducing agent
(c) acidic flux
(d) basic flux

Answer

Answer: (b) a reducing agent

---

Question 23.
Ellingham diagram represents change of
(a) ΔG with temperature
(b) ΔH with temperature
(c) ΔG with pressure
(d) (ΔG – TΔS) with temperature

Answer

Answer: (a) ΔG with temperature

---

Question 24.
During the extraction of haematite, limestone is added which acts as
(a) flux
(b) slag
(c) reducing agent
(d) gangue

Answer

Answer: (a) flux

---

Question 25.
In blast furnace iron oxide is reduced by
(a) silica
(b) carbon monoxide
(c) carbon
(d) lime stone

Answer

Answer: (b) carbon monoxide

---

Question 26.
From the Ellingham graph between Gibb’s energy and temperature, out of C and CO with is a better reducing agent for ZnO?
(a) Carbon
(b) CO
(c) Both of these
(d) None of these

Answer

Answer: (a) Carbon

---

Question 27.
In a thermite process is used as reducing agent.
(a) Zn
(b) Al
(c) Mn
(d) Fe

Answer

Answer: (b) Al

---

Question 28.
Blister copper is
(a) impure copper
(b) obtained in self reduction process during bessermerisation
(c) Both are correct
(d) None is correct

Answer

Answer: (c) Both are correct

---

Question 29.
Which of the following slags is produced during extraction of iron?
(a) CaSiO₃
(b) FeSiO₃
(c) MgSiO₃
(d) ZnSiO₃

Answer

Answer: (a) CaSiO₃

---

Question 30.
Which of the following oxides cannot be reduced by hydrogen?
(a) Ferric oxide
(b) Aluminium oxide
(c) Zinc oxide
(d) Cupric oxide

Answer

Answer: (b) Aluminium oxide

---

We hope the given NCERT MCQ Questions for Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements with Answers Pdf free download will help you. If you have any queries regarding General Principles and Processes of Isolation of Elements CBSE Class 12 Chemistry MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 12 Chemistry Chapter 5 Surface Chemistry with Answers Pdf free download. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. We have provided Surface Chemistry Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well.

Surface Chemistry Class 12 MCQs Questions with Answers

Surface Chemistry MCQ Question 1.
Volume of one mole of any gas at NTP is
(a) 11.2 litre
(b) 22.4 litre
(c) 10.2 litre
(d) 22.8 litre

Answer

Answer: (b) 22.4 litre

---

Surface Chemistry Class 12 MCQ Question 2.
Tyndall effect confirms the
(a) gravity effect on the sol. particles
(b) light scattering by the sol. particles
(c) heterogeneous nature of sols.
(d) Brownian motion of the sol. particles

Answer

Answer: (c) heterogeneous nature of sols.

---

MCQ On Surface Chemistry Question 3.
Which one of the following is alyophilic colloid?
(a) Milk
(b) Gum
(c) Fog
(d) Blood

Answer

Answer: (b) Gum

---

Class 12 Chemistry Chapter 5 MCQ Question 4.
Which of the following is not correct for enzyme catalysis?
(a) The enzyme activity is maximum at optimum pH which is between 5-7
(b) Each enzyme is specific for a given reaction
(c) The favourable temperature range of enzyme activity is between 25-37°C
(d) The enzymatic activity is increased in presence of certain substances.called co-enzymes

Answer

Answer: (c) The favourable temperature range of enzyme activity is between 25-37°C

---

MCQ On Surface Chemistry Class 12 Pdf Question 5.
Presence of traces of arsenious oxide (As₂O₃) in the reacting gases SO₂ and O₃ in presence of plantinised asbestos in contact process acts as
(a) catalytic promoter
(b) catalytic poison
(c) dehydrating agent
(d) drying agent

Answer

Answer: (b) catalytic poison

---

Ans. (b)
MCQ Of Surface Chemistry Class 12 Question 6.
Shape selective catalysis is a reaction catalysed by
(a) zeolite
(b) enzymes
(c) platinum
(d) Ziegler-Natta catalyst

Answer

Answer: (a) zeolite

---

Surface Chemistry MCQ Questions Question 7.
Which of the following types of metals make the most efficient catalyst?
(a) Alkali metals
(b) Transition metals
(c) Inner transition metals
(d) Alkaline earth metals

Answer

Answer: (b) Transition metals

---

Surface Chemistry MCQ With Answers Pdf Question 8.
The oxide of nitrogen which acts as a catalyst in lead chamber process is
(a) NO
(b) NO₂
(c) N₂O₄
(d) H₂O₅

Answer

Answer: (a) NO

---

Surface Chemistry MCQ Pdf Download Question 9.
The activity of an enzyme becomes ineffective
(a) at low temperature
(b) at atmospheric pressure
(c) at high temperature
(d) in aqueous medium

Answer

Answer: (c) at high temperature

---

Surface Chemistry Class 12 Objective Questions Question 10.
Which of the following can adsorb larger volume of hydrogen gas?
(a) Finely divided platinum
(b) Colloidal solution of palladium
(c) Small pieces of palladium
(d) A single metal surface of platinum

Answer

Answer: (b) Colloidal solution of palladium

---

MCQ Questions On Surface Chemistry Question 11.
Which of the following gases present in a polluted area will be adsorbed most easily on the charcoal gas mask?
(a) H₂
(b) O₃
(c) N₂
(d) SO₂

Answer

Answer: (d) SO₂

---

Chapter 5 Chemistry Class 12 MCQs Question 12.
Which kind of catalysis can be explained on the basis of adsorption theory ?
(a) Homogeneous catalysis
(b) Heterogeneous catalysis
(c) Negative catalysis
(d) Auto catalysis

Answer

Answer: (b) Heterogeneous catalysis

---

Surface Chemistry MCQ Class 12 Question 13.
A colloidal system is which liquid is dispersed phase and solid is dispersion medium is classified as
(a) gel
(b) sol
(c) emulsion
(d) aerosol

Answer

Answer: (a) gel

---

Class 12 Surface Chemistry MCQ Question 14.
Which of the following will not form a colloidal system?
(a) Solid-gas
(b) Liquid-gas
(c) Gas-gas
(d) Gas-liquid

Answer

Answer: (c) Gas-gas

---

Surface Chemistry Class 12 MCQ Questions Question 15.
Fog in an example of colloidal system of
(a) liquid in gas
(b) gas in liquid
(c) solid in gas
(d) gas in solid

Answer

Answer: (a) liquid in gas

---

Question 16.
Substances which behave as normal electrolytes solution at low concentration and exhibit colloids properties at higher concentration are called
(a) lyophilic colloids
(b) lyophobic colloids
(c) macromolecular colloids
(d) associated colloids

Answer

Answer: (d) associated colloids

---

Question 17.
Which of the following acts as the best coagulating agent for ferric hydroxide sol?
(a) Potassium ferrocyanide
(b) Potassium chloride
(c) Potassium oxalate
(d) Aluminium chloride

Answer

Answer: (a) Potassium ferrocyanide

---

Question 18.
The formation of micelles takes place only above
(a) critical temperature
(b) Kraft temperature
(c) inversion temperature
(d) absolute temperature

Answer

Answer: (b) Kraft temperature

---

Question 19.
The size of colloidal particles ranges between
(a) 10^-7 – 10^-8 cm
(b) 10^-9 – 10^-11 cm
(c) 10^-4 – 10^-7 cm
(d) 10^-2 – 10^-3 cm

Answer

Answer: (c) 10^-4 – 10^-7 cm

---

Question 20.
At CMC (critical micelle concentration) the surface molecules
(a) dissociate
(b) associate
(c) become bigger in size due to adsorption
(d) become smaller in size due to decomposition

Answer

Answer: (b) associate

---

Question 21.
Which of the following is not a method for coagulation of lyophobic sols?
(a) By electrophoresis
(b) By mixing oppositely charged sols
(c) By adding electrolyte
(d) By adding a protective colloid

Answer

Answer: (d) By adding a protective colloid

---

Question 22.
Why is alum added to water containing suspended impurities?
(a) To make acolloidal solution
(b) To coagulate the suspended impurities
(c) To remove impurities of calcium and magnesium
(d) To protect the colloidal solution from gening precipitated

Answer

Answer: (b) To coagulate the suspended impurities

---

Question 23.
Movement of dispersion medium under the influence of electric field is known as
(a) electrodialysis
(b) electrophoresis
(c) electroosmosis
(d) cataphoresis

Answer

Answer: (c) electroosmosis

---

Question 24.
Which of the following is not a method of removing impurities from a colloidal sol?
(a) Electrodialysis
(b) Ultrafiltration
(c) Ultra centrifugation
(d) Distillation

Answer

Answer: (d) Distillation

---

Question 25.
The substances which behave as colloidal solutions at higher concentration are called
(a) associated colloids
(b) multimolecular colloids
(c) macromolecular colloids
(d) protective colloids

Answer

Answer: (a) associated colloids

---

We hope the given NCERT MCQ Questions for Class 12 Chemistry Chapter 5 Surface Chemistry with Answers Pdf free download will help you. If you have any queries regarding Surface Chemistry CBSE Class 12 Chemistry MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 12 Biology Chapter 16 Environmental Issues with Answers Pdf free download. MCQ Questions for Class 12 Biology with Answers were prepared based on the latest exam pattern. We have provided Environmental Issues Class 12 Biology MCQs Questions with Answers to help students understand the concept very well.

Environmental Issues Class 12 MCQs Questions with Answers

MCQ On Environmental Issues With Answers Pdf Chapter 16 Question 1.
Which chemical substance affects the Ozone Layer?
(a) Chlorofluorocarbon
(b) Chlorine
(c) Hexafluorocarbon
(d) Molecular Carbon

Answer

Answer: (a) Chlorofluorocarbon

---

Environmental Issues MCQ Chapter 16 Question 2.
In Ozone Degradation which element acts as catalyst?
(a) Chlorine
(b) Flurine
(c) Oxygen
(d) Potassium

Answer

Answer: (a) Chlorine

---

MCQ On Environmental Issues Chapter 16 Question 3.
Ozone Layer is found in :
(a) Stratosphere
(b) Lithosphere
(c) Troposphere
(d) Hemisphere

Answer

Answer: (a) Stratosphere

---

Environmental Issues Class 12 MCQ Chapter 16 Question 4.
Acid Rain comes under which type of pollution?
(a) Water pollution
(b) Air pollution
(c) Soil pollution
(d) Sound Pollution

Answer

Answer: (c) Soil pollution

---

MCQ On Environmental Issues Class 12 Chapter 16 Question 5.
Environment (Protection) Act came into force in?
(a) 1986
(b) 1989
(c) 1992
(d) 1993

Answer

Answer: (c) 1992

---

MCQs On Environmental Issues Chapter 16 Question 6.
Bhopal gas tragedy of 1884 took place because methyl isocyanate reacted with:
(a) DDT
(b) Ammonia
(c) CO₂
(d) Water

Answer

Answer: (c) CO₂

---

Environmental Issues Questions And Answers Pdf  Question 7.
Chlorofluoro carbon are responsible for:
(a) Acid rain
(b) Ozone layer depletion
(c) Global warming
(d) Thermal inversion

Answer

Answer: (d) Thermal inversion

---

Environmental Issues MCQ Pdf Chapter 16 Question 8.
Fluoride pollution mainly affect:
(a) Teeth
(b) Kidney
(c) Brain
(d) Heart

Answer

Answer: (a) Teeth

---

Environmental Issues Class 12 MCQ Pdf Question 9.
Nutrient enrichment of water bodies causes:
(a) Stratification
(b) Eutrophication
(c) Succession
(d) None of these

Answer

Answer: (b) Eutrophication

---

Environmental Issues MCQs Chapter 16  Question 10.
Increased skin cancer and high mutation rate are due to:
(a) Acid Rain
(b) Ozone Depletion
(c) CO₂ Pollution
(d) CO Pollution

Answer

Answer: (b) Ozone Depletion

---

Environmental Issues MCQ Neet Chapter 16 Question 11.
Natural air pollutant are:
(a) Pollen Grains
(b) Gases of Volcanic Eruption
(c) Aerosol
(d) Fluorides

Answer

Answer: (b) Gases of Volcanic Eruption

---

Biology MCQs Class 12 Chapter 16 Question 12.
Which one of the following is not a greenhouse gas?
(a) Methane
(b) CO₂
(c) Chlorofluoro carbon
(d) Hydrogen

Answer

Answer: (d) Hydrogen

---

Biology MCQ Class 12 Chapter 16 Question 13.
Minimata disease is caused by:
(a) ByChromium
(b) By Cadmium
(c) By Methyl mercury
(d) By Radioactive elements

Answer

Answer: (c) By Methyl mercury

---

MCQ Biology Class 12 Chapter 16 Question 14.
Bluebaby syndrome results from:
(a) Excess of TDS
(b) Excess of DO
(c) Excess of chloride
(d) Methaemoglobin

Answer

Answer: (d) Methaemoglobin

---

Class 12 Biology MCQ Chapter 16 Question 15.
A mutagenic pollutant is:
(a) Organophosphate
(b) Resines
(c) Hydrocarbons
(d) Nitrogen oxides

Answer

Answer: (c) Hydrocarbons

---

Class 12 Biology Ncert MCQ Chapter 16 Question 16.
Pollutant which causes acid rain is:
(a) SO₂
(b) CO₂
(c) CO
(d) Hydrocarbon

Answer

Answer: (a) SO₂

---

Environmental Issues MCQ With Answers Chapter 16 Question 17.
Rain is called acid rain, its pH is below:
(a) 7
(b) 6.5
(c) 6
(d) 5.6

Answer

Answer: (d) 5.6

---

Environmental Issues Neet MCQ Chapter 16 Question 18.
Common indicator organism of water pollution is:
(a) Lemna pancicostata
(b) Eichhomia crassipes
(c) Escherichia coli
(d) Entamoeba histolytica

Answer

Answer: (c) Escherichia coli

---

Environmental Issues Neet MCQ Pdf Chapter 16 Question 19.
Pollution of SO₂ destroys:
(a) Lichen
(b) Fungi
(c) Algae
(d) Fish

Answer

Answer: (a) Lichen

---

Environmental Issues Neet MCQ Pdf Download Chapter 16 Question 20.
Permissible noise levels in a residential area at night time is:
(a) 35 dB
(b) 40 dB
(c) 45 dB
(d) 50 dB

Answer

Answer: (c) 45 dB

---

Question 21.
Act formulated in 1996 was:
(a) Insecticide Act
(b) Air (Prevention and Control of Pollution) Act
(c) Water (Prevention and control of Pollution) Act
(d) Environment protection Act

Answer

Answer: (d) Environment protection Act

---

We hope the given NCERT MCQ Questions for Class 12 Biology Chapter 16 Environmental Issues with Answers Pdf free download will help you. If you have any queries regarding Environmental Issues CBSE Class 12 Biology MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 12 Chemistry Chapter 3 Electrochemistry with Answers Pdf free download. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. We have provided Electrochemistry Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well.

Electrochemistry Class 12 MCQs Questions with Answers

Electrochemistry MCQ Class 12 Question 1.
If 96500 coulomb electricity is passed through CuSO₄ solution, it will liberate
(a) 63.5 gm of Cu
(b) 31.76 gm of Cu
(c) 96500 gm of Cu
(d) 100 gm of Cu

Answer

Answer: (b) 31.76 gm of Cu

---

Electrochemistry Class 12 MCQ Question 2.
Fused NaCl on electrolysis gives ………….. on cathode.
(a) Chlroine
(b) Sodium
(c) Sodium amalgam
(d) Hydrogen

Answer

Answer: (b) Sodium

---

MCQ On Electrochemistry Class 12 With Answers Question 3.
The standard electrode potentials for the half cell reactions are:
Zn → Zn^2-– 2e^– E° = 0.76 V
Fe → Fe^2- + 2^– E° = -0.41 V
The emf of the cell reaction
Fe^2- + Zn → Zn^2- + Fe is
(a) -0.35 V
(b) +0.35 V
(c) -1.17 V
(d) +1.17 V

Answer

Answer: (b) +0.35 V

---

Class 12 Chemistry Chapter 3 MCQ Question 4.
Which of the following is a secondary cell?
(a) Leclanche cell
(b) Lead storage battery
(c) Concentration cell
(d) All of these

Answer

Answer: (b) Lead storage battery

---

Electrochemistry MCQ Questions Class 12 Question 5.
For a certain redox reaction, E° is positive. This means that
(a) ΔG° is positive, K is greater than 1
(b) ΔG° is positive, K is less than 1
(c) ΔG° is negative, K is greater than 1
(d) ΔG° is negative, K is less than 1

Answer

Answer: (c) ΔG° is negative, K is greater than 1

---

Electrochemistry MCQ Class 12 Question 6.
Cell reaction is spontaneous, when
(a) E\(_{red}^{0}\) is negative
(b) ΔG° is negative
(c) E\(_{oxid}^{0}\) is Positive
(d) ΔG° is positive

Answer

Answer: (b) ΔG° is negative

---

MCQ Of Electrochemistry Class 12 Question 7.
Equilibrium constant K is related to E\(_{cell}^{0}\) and not E\(_{cell}\) because
(a) E\(_{cell}^{0}\) is easier to measure than E\(_{cell}\)
(b) E\(_{cell}\) becomes zero at equilibrium point but E\(_{cell}^{0}\) remains constant under all conditions
(c) at a given temperature, E\(_{cell}\) changes hence value of K can’t be measured
(d) any of the terms E\(_{cell}\) or E\(_{cell}^{0}\) can be used

Answer

Answer: (b) E\(_{cell}\) becomes zero at equilibrium point but E\(_{cell}^{0}\) remains constant under all conditions

---

MCQ Electrochemistry Class 12 Question 8.
Molar conductivity of 0.15 M solution of KCl at 298 K, if its conductivity of 0.0152 S cm^-1 w ill be
(a) 124 Ω^-1 cm² mol^-1
(b) 204 Ω^-1 cm² mol^-1
(c) 101 Ω^-1 cm² mol^-1
(d) 300 Ω^-1 cm² mol^-1

Answer

Answer: (c) 101 Ω^-1 cm² mol^-1

---

MCQ Questions For Class 12 Chemistry Chapter 3 Question 9.
Electrical conductance through metals is called metallic or electronic conductance and is due to the movement of electrons. The electronic conductance depends on
(a) the nature and structure of the metal
(b) the number of valence electrons per atom
(c) change in temperature
(d) all of these

Answer

Answer: (d) all of these

---

MCQ Of Chapter 3 Chemistry Class 12 Question 10.
The specific conductivity of N/10 KCl solution at 20°C is 0.0212 ohm^-1 cm^-1 and the resistance of the cell containing this solution at 20°C is 55 ohm. The cell constant is
(a) 3.324 cm^-1
(b) 1.166 cm^-1
(c) 2.372 cm^-1
(d) 3.682 cm^-1

Answer

Answer: (b) 1.166 cm^-1

---

MCQ On Electrochemistry Class 12 Pdf Question 11.
Faraday’s law of electrolysis is related to
(a) Atomic number of cation
(b) Speed of cation
(c) Speed of anion
(d) Equivalent weight of electrolyte

Answer

Answer: (d) Equivalent weight of electrolyte

---

Class 12 Electrochemistry MCQ Question 12.
The molar conductivity is maximum for the solution of concentration
(a) 0.004 M
(b) 0.002 M
(c) 0.005 M
(d) 0.001 M

Answer

Answer: (d) 0.001 M

---

MCQ Questions On Electrochemistry Question 13.
Units of the properties measured are given below. Which of the properties has been not matched correctly?
(a) Molar conductance = Sm² mol^-1
(b) Cell constant = m^-1
(c) Specific conductance of = S m²
(d) Equivalence conductance = S m² (g eq)^-1

Answer

Answer: (c) Specific conductance of = S m²

---

MCQ On Electrochemistry Class 12 Question 14.
How long would it take to deposit 50 g of Al from an electrolytic cell containing Al₂O₃ using a current of 105 ampere?
(a) 1.54 h
(b) 1.42 h
(c) 1.32 h
(d) 2.15 h

Answer

Answer: (b) 1.42 h

---

Electrochemistry MCQ Pdf Download Question 15.
The charge required for reducing 1 mole of MnO\(_{4}^{-}\) to Mn^2- is
(a) 1.93 × 10⁵ C
(b) 2.895 × 10⁵ C
(c) 4.28 × 10⁵ C
(d) 4.825 × 10⁵ C

Answer

Answer: (d) 4.825 × 10⁵ C

---

Question 16.
How much electricity in in terms of Faraday is required to produce 100 g of Ca from molten CaCl₂?
(a) 1F
(b) 2F
(c) 3F
(d) 5F

Answer

Answer: (d) 5F

---

Question 17.
If a current of 1.5 ampere flows through a metallic wire for 3 hours, then how many electrons would flow through the wire?
(a) 2.25 × 10²² electrons
(b) 1.13 × 10²³ electrons
(c) 1.01 × 10²³ electrons
(d) 4.5 × 10²³ electrons

Answer

Answer: (c) 1.01 × 10²³ electrons

---

Question 18.
How many coulombs of electricity is required to reduce 1 mole of Cr₂O\(_{7}^{2-}\) in acidic medium?
(a) 4 × 96500 C
(b) 6 × 96500 C
(c) 2 × 96500 C
(d) 1 × 96500 C

Answer

Answer: (b) 6 × 96500 C

---

Question 19.
A current of 1.40 ampere is passed through 500 mL of 0.180 M solution of zinc sulphate for 200 seconds. What will be the molarity of Zn²⁺ions after deposition of zinc?
(a) 0.154 M
(b) 0.177 M
(c) 2 M
(d) 0.180 M

Answer

Answer: (b) 0.177 M

---

Question 20.
How much time is required to deposit 1 × 10^-3 cm thick layer of silver (density of 1.05 g cm^-3) on a surface of area 100 cm² by passing a current of 5 A through AgNO₃ solution?
(a) 125 s
(b) 115 s
(c) 18.7 s
(d) 27.25 s

Answer

Answer: (c) 18.7 s

---

We hope the given NCERT MCQ Questions for Class 12 Chemistry Chapter 3 Electrochemistry with Answers Pdf free download will help you. If you have any queries regarding Electrochemistry CBSE Class 12 Chemistry MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.