Category: MCQ Questions

Check the below Online Education NCERT MCQ Questions for Class 12 Physics Chapter 2 Electrostatic Potential and Capacitance with Answers Pdf free download. MCQ Questions for Class 12 Physics with Answers were prepared based on the latest exam pattern. We have provided Electrostatic Potential and Capacitance Class 12 Physics MCQs Questions with Answers to help students understand the concept very well.

Electrostatic Potential and Capacitance Class 12 MCQs Questions with Answers

Class 12 Physics Chapter 2 MCQ Question 1.
The dimensions of fall of potential per unit distance are given by:
(a) [MLT^-3 A^-1]
(b) [ML²T^-2A^-1]
(c) [ML²T^-2A^-3]
(d) [MLT^-2A^-2]

Answer

Answer: (c) [ML²T^-2A^-3]

---

Electrostatic Potential And Capacitance MCQ Question 2.
Which of the following is blocked by a capacitor ?
(a) A.C.
(b) D.C.
(c) Both A.C. and D.C.
(d) Neither A.C. nor D. C

Answer

Answer: (b) D.C.

---

Chapter 2 Physics Class 12 MCQ Question 3.
Two copper spheres of the same radius, one solid and the other hollow, are charged to the same potential. Which will have more charge?
(a) Solid sphere
(b) Hollow sphere
(c) Both will have an equal charge
(d) None of these

Answer

Answer: (c) Both will have an equal charge

---

Electrostatic Potential And Capacitance Class 12 MCQ Question 4.
The capacitance of a capacitor will decrease if we introduce a slab of:
(a) copper
(b) aluminium
(c) zinc
(d) None of these

Answer

Answer: (d) None of these

---

Electric Potential And Capacitance MCQ Question 5.
Two capacitors of capacitance 6 µF and 4 µF are put in series across a 120 V battery. What is the potential difference across the 4 µF capacitor ?
(a) 72 V
(b) 60 V
(c) 48 V
(d) zero

Answer

Answer: (a) 72 V

---

Physics Class 12 Chapter 2 MCQ Question 6.
In which of the following forms is the energy stored in a capacitor?
(a) Charge
(b) Potential
(c) Capacitance
(d) Electric field

Answer

Answer: (d) Electric field

---

Ch 2 Physics Class 12 MCQ Question 7.
Two conducting spheres of radii r₁ and r₂ are equally charged. The ratio of their potential is
(a) (r₁/r₂)²
(b) (r₁r₂)²
(c)(r₁/r₂)
(d) (r₂/r₁)

Answer

Answer: (b) (r₁r₂)²

---

MCQ On Electrostatic Potential And Capacitance Question 8.
Twenty seven drops of mercury are charged simultaneously to the same potential of 10 volts. What will be potential if all the charged drops are made to combine to form one large drop ?
(a) 180 V
(b) 90 V
(c) 120 V
(d) 45 V

Answer

Answer: (b) 90 V

---

MCQ Of Chapter 2 Physics Class 12 Question 9.
The P.E. of an electric dipole is maximum when it makes an angle θ with electric field. The value of θ is :
(a) \(\frac{π}{2}\)
(b) π
(c) zero
(d) \(\frac{3π}{2}\)

Answer

Answer: (b) π

---

MCQ Of Electrostatics Class 12 Question 10.
The amount of work required to increase the distance between -6µC and 4µC from 6 cm to 18 cm will be :
(a) 1.8 J
(b) 2.4 J
(c) 1.8 µJ
(d) 2.4 µJ

Answer

Answer: (b) 2.4 J

---

Class 12 Physics Ch 2 MCQ Question 11.
An electron initially at rest is accelerated through a potential difference of one volt. The energy gained by electron is:
(a) 1 J
(b) 1.6 × 10^-19 J
(c) 10^-19 J
(d) None of these

Answer

Answer: (b) 1.6 × 10^-19 J

---

Physics Chapter 2 MCQ Class 12 Question 12.
A bird sitting on a high power line:
(a) gets killed instantly
(b) gets a mild shock
(c) gets a fatal shock
(d) is not affected practically

Answer

Answer: (d) is not affected practically

---

MCQ On Electrostatics Class 12 Question 13.
Choose the SI unit of electric potential energy :
(a) Joule
(b) Coulomb
(c) Netwon per coulomb
(d) Erg

Answer

Answer: (a) Joule

---

Electrostatics Class 12 MCQ Question 14.
The capacitance of earth, viewed as a spherical conductor of radius 6408 km is:
(a) 1420 µF
(b) 712 µF
(c) 680 µF
(d) 540 µF

Answer

Answer: (b) 712 µF

---

MCQs Of Physics Class 12 Chapter 2 Question 15.
A capacitor is connected to a cell of emf E having some internal resistance r, the potential across the:
(a) cell is < E
(b) cell is E
(b) cell is > E
(d) capacitor is E

Answer

Answer: (b) cell is E

---

Class 12 Physics Chapter 2 MCQ Questions And Answers Question 16.
If a +ve charge is moved from low to high potential region,
the electric potential energy:
(a) decreases
(b) increases
(c) remain the same
(d) may increase or decrease

Answer

Answer: (b) increases

---

MCQ Class 12 Physics Chapter 2 Question 17.
A capacitor is connected across a battery and the plate separation of capacitor is increased without removing the battery, then:
(a) capacitance will increase
(b) charge stored will increase
(c) energy stored will decrease
(d) potential difference will increase

Answer

Answer: (c) energy stored will decrease

---

MCQ On Capacitors Class 12 Question 18.
Two capacitors of 3 µF and 6 µF are connected in series with a battery of P.d. 12 V. The P.d. across 3µF and 6µF
capacitors respectively will be :
(a) 8 V, 4 V
(b) 6 V, 6 V
(c) 4 V, 8 V
(d) 9 V, 3 V

Answer

Answer: (a) 8 V, 4 V

---

MCQ Questions For Class 12 Physics Chapter 2 Question 19.
An electric charge of 425 f µC is removed from a fully charged capacitor of capacitance 8.5µF. Its potential will be lowered by:
(a) 75 V
(b) 100 V
(c) 85 V
(d) 50 V

Answer

Answer: (b) 100 V

---

Question 20.
A dielectric is placed in between the two parallel plates of a capacitor as shown in the figure. The dielectric constant of the dielectric being K. If the initial capacity is C, then the new capacity will be:

(a) (K + l).C
(b) K.C
(c) \(\frac{(K+1)}{2}\) C
(d) (k – l) C

Answer

Answer: (c) \(\frac{(K+1)}{2}\) C

---

Question 21.
Minimum number of capacitor of 2µF each required to obtain a capacitance of 5µF will be:
(a) 4
(b) 3
(c) 5
(d) 6

Answer

Answer: (a) 4

---

Question 22.
When a dielectric slab is introduced between the plates of a parallel plate capacitor which remains connected to a battery then charge on the plates relative to earlier charge is :
(a) more
(b) less
(c) less or may be more
(d) same

Answer

Answer: (a) more

---

Ans. (a)
Question 23.
Choose the vector physical quantity:
(a) Electric flux
(b) Electric potential
(c) Electric potential energy
(d) Electric intensity

Answer

Answer: (d) Electric intensity

---

Question 24.
The surface density of charge is measure:
(a) Cm^-1
(b) Cm^-2
(c) Cm^-3
(d) JC^-1

Answer

Answer: (b) Cm^-2

---

Question 25.
A polythene piece rubbed with wool is found to have a negative charge of 6.4 × 10^-9c. How many electrons have been transferred during the process?
(a) 4 × 10¹²
(b) 4 × 10¹¹
(c) 4 × 10¹⁰
(d) None of these

Answer

Answer: (c) 4 × 10¹⁰

---

Question 26.
In the above question:
(a) no electrons are transferred
(b) electrons are transferred from wool to x polythene
(c) electrons are transferred from polythene to wool
(d) nothing can be decided

Answer

Answer: (b) electrons are transferred from wool to x polythene

---

Question 27.
In previous question, mass transferred to polythene is:
(a) 3.64 × 10²⁰ kg
(b) 4 × 10^-28 kg
(c) 4 × 10¹⁰ kg
(d) None of these

Answer

Answer: (a) 3.64 × 10²⁰ kg

---

Question 28.
What is the number of electrons in 100 g water?
(a) 3.35 × 10²⁴
(b) 3.35 × 10²⁵
(c) 6.02 × 10²³
(d) None of these

Answer

Answer: (a) 3.35 × 10²⁴

---

Question 29.
A uniform electric field of 10 NC^-1 exists in the vertically downward direction. What is the increase in the electric potential asonegoes up through a height of 300 cm ?
(a) 15 V
(b) 30 V
(c) 45V
(d) None of these

Answer

Answer: (b) 30 V

---

Question 30.
The electric potential of earth is taken as:
(a) zero
(b) infinity
(c) unity
(d) None of these

Answer

Answer: (a) zero

---

We hope the given NCERT MCQ Questions for Class 12 Physics Chapter 2 Electrostatic Potential and Capacitance with Answers Pdf free download will help you. If you have any queries regarding Electrostatic Potential and Capacitance CBSE Class 12 Physics 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 Physics Chapter 5 Magnetism and Matter with Answers Pdf free download. MCQ Questions for Class 12 Physics with Answers were prepared based on the latest exam pattern. We have provided Magnetism and Matter Class 12 Physics MCQs Questions with Answers to help students understand the concept very well.

Magnetism and Matter Class 12 MCQs Questions with Answers

Magnetism And Matter Class 12 MCQ Question 1.
S.I. unit of flux is :
(a) Ohm
(b) Weber
(c) Tesla
(d) None

Answer

Answer: (b) Weber

---

Class 12 Physics Chapter 5 MCQ Question 2.
What is the angle of dip at a place where the horizontal component of earth’s magnetic field is equal to the vertical component?
(a) 0°
(b) 30°
(c) 45°
(d) 90°

Answer

Answer: (c) 45°

---

Magnetism And Matter MCQ Question 3.
Which of the following has a low value in ferrites?
(a) Conductivity
(b) Permeability
(c) Magnetic susceptibility
(d) All the above

Answer

Answer: (a) Conductivity

---

Chapter 5 Physics Class 12 MCQ Question 4.
The dimensional representation of magnetic flux density is :
(a) [MLT^-2]
(b) [MLT^-2A^-1]
(c) [MLT^-2A^-2]
(d) [MT^-2A^-1]

Answer

Answer: (d) [MT^-2A^-1]

---

Ch 5 Physics Class 12 MCQ Question 5.
Tangent law is applicable only when:
(a) two uniform and mutually perpendicular magnetic fields exist
(b) two magnetic fields exist
(c) horizontal component of earth’s magnetic field is present
(d) uniform magnetic field are used

Answer

Answer: (a) two uniform and mutually perpendicular magnetic fields exist

---

Magnetism MCQ Class 12 Question 6.
Ferrites may be:
(a) ant. ferromagnetic
(b) ferromagnetic
(c) ferrimagnetic
(d) None of the above

Answer

Answer: (b) ferromagnetic

---

Physics Class 12 Chapter 5 MCQ Question 7.
A magnetic bar of M magnetic moment is placed m the field of magnetic strength B, the torque acting on it is :
(a) \(\vec{M} \).\(\vec{B} \)
(b) –\(\vec{M} \).\(\vec{B} \)
(c) \(\vec{M} \) × \(\vec{B} \).
(d) \(\vec{B} \) × \(\vec{M} \)

Answer

Answer: (c) \(\vec{M} \) × \(\vec{B} \).

---

MCQ On Magnetism Class 12 Question 8.
The magnetic lines of force inside a bar magnet:
(a) do not exist
(b) depends on area of cross-section of bar magnet
(c) are from N-pole to S-pole of the magnet
(d) are from S-pole to N-pole of the magnet.

Answer

Answer: (d) are from S-pole to N-pole of the magnet.

---

MCQ On Magnetism Class 12 Pdf Question 9.
A magnetic dipole moment is a vector quantity directed from:
(a) S to N
(b) N to S
(c) E to W
(d) W to E

Answer

Answer: (a) S to N

---

MCQ Of Chapter 5 Physics Class 12 Question 10.
What is the magnetic field in the empty space enclosed by the toroidal solenoid of radius ‘R’? ,
(a) Infinity
(b) \(\frac{µ_0}{4π}\).\(\frac{2πl}{R}\)
(c) \(\frac{µ_0}{4π}\).(\(\frac{πl}{R}\))
(d) zero

Answer

Answer: (d) zero

---

Magnetism Class 12 MCQ Question 11.
A current carrying power line carries current from west to east. What will be direction of magnetic field 1 meter above it?
(a) N to S
(b) S to N
(c) E to W
(d) W to E

Answer

Answer: (a) N to S

---

Class 12 Physics Ch 5 MCQ Question 12.
The dimensional representation of \(\sqrt{l/MB}\) is similar to that of:
(a) frequency
(b) time
(c) distance
(d) speed

Answer

Answer: (b) time

---

Magnetism And Matter Class 12 MCQ Questions Question 13.
On quadrupling the moment of inertia of a magnet, its frequency of oscillation will become:
(a) half
(b) double
(c) four times
(d) one-fourth

Answer

Answer: (a) half

---

MCQ On Magnetism And Matter Question 14.
The magnetic field strength due to a short bar magnet directed along its axial line at a distance r is B. What is its value at the same distance along the equatorial line?
(a) B
(b) 2B
(c) \(\frac{B}{2}\)
(d) \(\frac{B}{4}\)

Answer

Answer: (c) \(\frac{B}{2}\)

---

Physics Chapter 5 Class 12 MCQ Question 15.
The neutral point in the magnetic field of a horizontally placed bar magnet is a point where the magnetic field due to that bar magnet is:
(a) zero
(b) more than that of earth
(c) less than that of earth
(d) equal to that of earth

Answer

Answer: (d) equal to that of earth

---

Question 16.
In a moving coil galvanometer, we use a radial magnetic field so that the galvanometer scale is :
(a) exponential
(b) linear
(c) algebraic
(d) logarithmic

Answer

Answer: (b) linear

---

Question 17.
The force between two parallel wire 2 × 10^-7 Nm^-1, placed 1 m apart to each other in vacuum. The electric current flowing through the wires is:
(a) 1 A
(b) zero
(c) 5 × 10⁶ A
(d) 2 × 10^-7 A

Answer

Answer: (a) 1 A

---

Question 18.
The force acting per unit length of a semi circular wire of radius R carrying a current I is:
(a) \(\frac{µ_0l^2}{4R}\)
(b) \(\frac{µ_0l^2}{2R}\)
(c) \(\frac{µ_0l^2}{R}\)
(d) \(\frac{2µ_0l^2}{R}\)

Answer

Answer: (a) \(\frac{µ_0l^2}{4R}\)

---

Question 19.
Which of the following has higher magnetic susceptibility?
(a) diamagnetic
(b) paramagnetic
(c) ferromagnetic
(d) None of these

Answer

Answer: (c) ferromagnetic

---

Question 20.
The magnetic field of earth is due to:
(a) induction effect of the sun
(b) the presence of a large magnet at the centre of the earth
(c) interaction of cosmic rays with the current of earth
(d) motion and distribution of some material in an outside the earth

Answer

Answer: (d) motion and distribution of some material in an outside the earth

---

Question 21.
In a bar magnet, magnetic lines of force z :
(a) are produced only at north pole like rays of light from a bulb
(b) starts from north pole and ends at the south pole
(c) emerge in circular paths from the middle of the bar
(d) run continuously through the bar and outside

Answer

Answer: (b) starts from north pole and ends at the south pole

---

Question 22.
The Mariner’s compass is provided with Gimbals arrangement so as to :
(a) keep the needle always horizontal
(b) give a direct reading of declination
(c) give the direct value of dip
(d) all of the above

Answer

Answer: (c) give the direct value of dip

---

Question 23.
A wire of length I has a magnetic moment M. It is then bent into a semi-circular arc. The neyv magnetic moment is :
(a) M
(b) M.l.
(c) \(\frac{2M}{π}\)
(d) \(\frac{M}{π}\)

Answer

Answer: (c) \(\frac{2M}{π}\)

---

Question 24.
The relation between geometric length (L) and magnetic length (L_m) is:
(a) L_m = \(\frac{5}{6}\) L_g
(b) L_m = \(\frac{6}{5}\) L_g
(c) (a) L_m = L_g
(d) L_m = 2RY;UL L_g

Answer

Answer: (a) L_m = \(\frac{5}{6}\) L_g

---

Question 25.
The radius of curvature of the path of charged particle in a uniform magnetic file is directly proportional to the
(a) charge on fie particle
(b) Momentum of particle
(c) energy of particle
(d) Strength of field

Answer

Answer: (b) Momentum of particle

---

Question 26.
The magnetic field at the centre of a current carrying circular loop is B. If the radius of the loop is doubled keeping the current unchanged, the magnetic field at the centre of loop will become:
(a) \(\frac{B}{2}\)
(b) \(\frac{B}{4}\)
(c) 2B
(d) 4B

Answer

Answer: (b) \(\frac{B}{4}\)

---

We hope the given NCERT MCQ Questions for Class 12 Physics Chapter 5 Magnetism and Matter with Answers Pdf free download will help you. If you have any queries regarding Magnetism and Matter CBSE Class 12 Physics 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 Physics Chapter 12 Atoms with Answers Pdf free download. MCQ Questions for Class 12 Physics with Answers were prepared based on the latest exam pattern. We have provided Atoms Class 12 Physics MCQs Questions with Answers to help students understand the concept very well.

Atoms Class 12 MCQs Questions with Answers

Atoms Class 12 MCQ Question 1.
An atom stays in an excited state for about:
(a) 10 micro seconds
(b) 10 milli seconds
(c) 10 nano seconds
(d) 10 seconds

Answer

Answer: (c) 10 nano seconds

---

Atoms MCQ Questions Class 12 Question 2.
The energy equivalent to one atomic mass unit is :
(a) 1.6 × 10^-19 J
(b) 6.02 × 10²³ J
(c) 9.31 MeV
(d) 931 MeV

Answer

Answer: (d) 931 MeV

---

Chapter 12 Physics Class 12 MCQs Question 3.
Who explained the splitting of special lines in magnetic field?
(a) Zeeman
(b) Bohr
(c) Summerfield
(d) Einstein

Answer

Answer: (a) Zeeman

---

Class 12 Physics MCQ Question 4.
The mass of a neutron is:
(a) 1.00866 u
(b) 1.0866 u
(c) 1.866 u
(d) 0.1866 u

Answer

Answer: (a) 1.00866 u

---

Physics Class 12 MCQ Questions Question 5.
Isobars have the same:
(a) A
(b) Z
(c) N
(d) All the above

Answer

Answer: (a) A

---

Class 12 MCQ Physics Question 6.
Isotones have the same:
(a) A
(b) Z
(c) N
(d) All the above

Answer

Answer: (c) N

---

Physics 12th MCQ Questions Question 7.
Half-life of a substance depends on:
(a) pressure
(b) temperature
(c) density
(d) None of these

Answer

Answer: (d) None of these

---

Learninsta Class 12 Physics Question 8.
The concept of electron spin was introduced by:
(a) Becquerel
(b) Goudsmit
(c) Millikan
(d) Uhlenbeek and Goudsmit

Answer

Answer: (d) Uhlenbeek and Goudsmit

---

Atomic Physics Questions And Answers Pdf Question 9.
The principle that a quantum orbital cannot be occupied by more than two electrons was given by:
(a) Pauli
(b) Millikan
(c) Hund
(d) None of these

Answer

Answer: (a) Pauli

---

Physics MCQ Class 12 Question 10.
For ionization of excited Hydrogen atom, the, required energy is:
(a) a little less than 13.6
(b) equal to 13.6
(c) more than 13.6
(d) 3.4 or less

Answer

Answer: (d) 3.4 or less

---

Physics Class 12 MCQ Question 11.
According to Bohr’s theory of hydrogen atom, the radius r of stationary orbit are related to principal quantum number n as:
(a) r_g ∝ \(\frac{1}{n^2}\)
(b) r_g ∝ \(\frac{1}{n}\)
(c) r_g ∝ n
(d) r_g ∝ n²

Answer

Answer: (d) r_g ∝ n²

---

MCQ Physics Class 12 Question 12.
F_g and F_e represents the gravitational and electrostatic force respectively between two electrons situated at some distance the ratio \(\frac{F_g}{F_e}\) is if the order of:
(a) 9.8
(b) 10⁹
(c) 10⁴²
(d) 10^-42

Answer

Answer: (d) 10^-42

---

Question 13.
Artificial radioactivity was discovered by:
(a) Joliot
(b) Becquerel
(c) Pauli
(d) None of these

Answer

Answer: (a) Joliot

---

Question 14.
P-decay produces:
(a) isobars
(b) isotopes
(c) isotones
(d) All the above

Answer

Answer: (a) isobars

---

Question 15.
Natural radioactivity was discovered by:
(a) Joliot
(b) Becquerel
(c) Pauli
(d) None of these

Answer

Answer: (b) Becquerel

---

Question 16.
Transmutation of nuclei was discovered by:
(a) Rutherford
(b) Becquerel
(c) Pauli
(d) None of these

Answer

Answer: (a) Rutherford

---

Question 17.
The energy equivalent to mass defect is called :
(a) binding energy
(b) internal energy
(c) external energy
(d) enthalpy

Answer

Answer: (a) binding energy

---

Question 18.
The total energy that will be released if a nucleus is built from its constituents is called the:
(a) binding energy of the nucleus
(b) binding energy of the solid
(c) binding energy of the atom
(d) None of these

Answer

Answer: (a) binding energy of the nucleus

---

Question 19.
The binding energy of \(_{2}^{4}\)He is about:
(a) 28.3 eV
(b) 28.3 MeV
(c) 28.3 J
(d) 2.83 MeV

Answer

Answer: (b) 28.3 MeV

---

Question 20.
The binding energy of a deuteron is about:
(a) 2.22 MeV
(b) 2.22 J
(c) 2.22 eV
(d) None of these

Answer

Answer: (a) 2.22 MeV

---

We hope the given NCERT MCQ Questions for Class 12 Physics Chapter 12 Atoms with Answers Pdf free download will help you. If you have any queries regarding Atoms CBSE Class 12 Physics 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 Physics Chapter 4 Moving Charges and Magnetism with Answers Pdf free download. MCQ Questions for Class 12 Physics with Answers were prepared based on the latest exam pattern. We have provided Moving Charges and Magnetism 12 Physics MCQs Questions with Answers to help students understand the concept very well.

Moving Charges and Magnetism Class 12 MCQs Questions with Answers

Class 12 Physics Chapter 4 MCQ Question 1.
The current sensitibility of a moving coil galanometer increases with decrease in:
(a) magnetic field
(b) area of a coil
(c) number of turns
(d) None of these

Answer

Answer: (d) None of these

---

Moving Charges And Magnetism MCQ Question 2.
A current carring coil is placed in a uniform magnetic field. If the coil turns through an angle θ, then the torque is directly proportional to:
(a) sin θ
(b) cos θ
(c) cot θ
(d) tan θ

Answer

Answer: (b) cos θ

---

Moving Charges And Magnetism Class 12 MCQ Question 3.
The sensitivity of a tangent galvanometer can be increased by increasing:
(a) the radius of the coil
(b) the external magnetic field
(c) the number of turns of the coil
(d) all the above

Answer

Answer: (b) the external magnetic field

---

Chapter 4 Physics Class 12 MCQ Question 4.
The permeability of a paramagnetic substance is:
(a) very large
(b) small but more than unity
(c) less than unity
(d) negative

Answer

Answer: (b) small but more than unity

---

MCQ On Moving Charges And Magnetism Question 5.
Which of the following shows that the earth behaves as a magnet?
(a) Repulsion between like poles .
(b) Attraction between unlike poles
(c) Null points in the magnetic field of a bar magnet
(d) No existence of isolated magnetic poles

Answer

Answer: (c) Null points in the magnetic field of a bar magnet

---

Moving Charges And Magnetism Class 12 MCQs Question 6.
What is the angle of dip at the magnetic poles ?
(a) 30°
(b) 0°
(c) 45°
(d) None of these

Answer

Answer: (d) None of these

---

Ch 4 Physics Class 12 MCQ Question 7.
A charged particle of mass m and charge q travels on a circular path of radius r i.e., perpendicular to the magnetic field B. The time taken by particle to complete on revolution is :
(a) \(\frac{2πqB}{m}\)
(b) \(\frac{2πm}{qB}\)
(c) \(\frac{2πmq}{B}\)
(d) \(\frac{2πq^2B}{m}\)

Answer

Answer: (b) \(\frac{2πm}{qB}\)

---

Physics Class 12 Chapter 4 MCQ Question 8.
Circular loop of radius 0.0157 m carries a current 2 A. The magnetic field at the centre of the loop is :
(a) 1.57 × 10^-3Wb/m²
(b) 8.0 × 10^-5 Wb/m²
(c) 2.0 × 10^-3 Wb/m²
(d) 3.l4 × 10^-1 Wb/m²

Answer

Answer: (b) 8.0 × 10^-5 Wb/m²

---

MCQ Of Chapter 4 Physics Class 12 Question 9.
What happens to the magnetic field at the centre of a circular current carrying coil if we double the radius of the coil keeping the current unchanged?
(a) halved
(b) doubled
(c) quadrupled
(d) remains unchanged

Answer

Answer: (a) halved

---

Magnetic Effect Of Current Class 12 MCQ Question 10.
When we double the radius of a coil keeping the current through it unchanged, what happens to the magnetic field directed along its axis at far off points?
(a) halved
(b) doubled
(c) quadrupled
(d) remains unchanged

Answer

Answer: (d) remains unchanged

---

MCQ Questions On Magnetic Effects Of Electric Current Class 12 Question 11.
The strength of the magnetic field around an infinite current carrying conductor is :
(a) same everywhere
(b) inversely proportional to the distance
(c) directly proportional to the distance
(d) None of these

Answer

Answer: (b) inversely proportional to the distance

---

Class 12 Physics Ch 4 MCQ Question 12.
A current carrying power line carries current from west to east. Then the direction of the magnetic field 2 m above it is :
(a) west to east
(b) south to north
(c) north to south
(d) None of these

Answer

Answer: (c) north to south

---

Magnetic Effect Of Electric Current Class 12 MCQ Pdf Question 13.
According to Ampere’s Circuital law

Answer

Answer: (b)

---

Physics Chapter 4 Class 12 MCQ Question 14.
The force between two parallel current carrying conductors is F. If the current in each conductor is doubled, then the force between them becomes :
(a) 4F
(b) 2F
(c) F
(d) \(\frac{F}{4}\)

Answer

Answer: (a) 4F

---

Class 12 Physics Chapter 4 MCQ Questions Question 15.
How much force will be experienced by a moving charge in a magnetic field? The symbols have their usual meanings.
(a) \(\vec{F}\) = q(\(\vec{v}\).\(\vec{B}\))
(b) \(\vec{F}\) = \(\frac{q}{(\vec{v}.\vec{B})}\)
(c) \(\vec{F}\) = \(\frac{q}{2}\)\((\vec{v}×\vec{B}\))
(d) \(\vec{F}\) = q(\(\vec{v}\)×\(\vec{B}\))

Answer

Answer: (d) \(\vec{F}\) = q(\(\vec{v}\)×\(\vec{B}\))

---

Question 16.
Which of the following is not a unit of magnetic induction?
(a) gauss
(b) tesla
(c) oersted
(d) weber/metre²

Answer

Answer: (c) oersted

---

Question 17.
The magnetic field produced by an / meter long straight (x cry thin) current (I) carry ing conductor at any point on itself is :
(a) zero
(b) infinite
(c) \(\frac{µ_0l}{4πl}\)
(d) \(\frac{µ_0l}{2πl}\)

Answer

Answer: (a) zero

---

Question 18.
A charge + q is sent through a magnetic field. The force acting on it is maximum w hen the angle between the direction of motion of the charged particle and the magnetic field :
(a) 0°
(b) 45°
(c) 90°
(d) 180°

Answer

Answer: (c) 90°

---

Question 19.
An electron having mass ‘m’ and Kinetic energy E enters in uniform magnetic field B perpendicular, then its frequency will be:
(a) \(\frac{eE}{qmB}\)
(b) \(\frac{2πm}{eB}\)
(c) \(\frac{eB}{2πm}\)
(d) \(\frac{2m}{eBE}\)

Answer

Answer: (c) \(\frac{eB}{2πm}\)

---

Question 20.
A wire of length 2 metre carries a current 1 ampere, is bent to form a circle. The magnetic moment of the coil is :
(a) 2π
(b) π/2
(c) π/4
(d) 1/π

Answer

Answer: (d) 1/π

---

Question 21.
The magnetic field of a given length of a ware for single turn coil at its centre is B. Then.its value for two turns of coil will be :
(a) B/4
(b) B/2
(c) 4B
(d) 2B

Answer

Answer: (c) 4B

---

Question 22.
When charged particle enters-a uniform magnetic field, its K.E.:
(a) remains constant
(b) increases
(c) decreases
(d) becomes zero

Answer

Answer: (a) remains constant

---

Question 23.
To convert galvanometer into voltmeter one should connect :
(a) high resistance in series with galvanometer
(b) low resistance in series with galvanometer
(c) high resistance in parallel with galvanometer
(d) low resistance in parallel with galvanometer

Answer

Answer: (a) high resistance in series with galvanometer

---

Question 24.
A charge q moves in a region, where electric field E and magnetic field B both exist, then force on it is :
(a) \(\vec{F}\) = q(\(\vec{v}\)×\(\vec{B}\))
(b) \(\vec{F}\) = q{\(\vec{E}\)×(\(\vec{v}\) × \(\vec{B}\))}
(c) \(\vec{F}\) = q(\(\vec{E}\) + (\(\vec{B}\) × \(\vec{v}\))
(d) \(\vec{F}\) = q(\(\vec{B}\) + (\(\vec{E}\) ×\(\vec{v}\))

Answer

Answer: (b) \(\vec{F}\) = q{\(\vec{E}\)×(\(\vec{v}\) × \(\vec{B}\))}

---

Question 25.
Isoclinic lines are the lines joining places with :
(a) equal dip
(b) equal declination
(cj equal dip and declination
(d) None of these

Answer

Answer: (a) equal dip

---

Question 26.
Two identical bar magnets each of dipole moment p and length I are perpendicular to each other as shown in Fig. The dipole moment of the combination is:

(a) √2 p
(b) \(\frac{p}{√2}\)
(c) P
(d) 2p

Answer

Answer: (a) √2 p

---

Question 27.
The most suitable metal for making permanent magnets is :
(a) iron
(b) steel
(c) copper
(d) aluminium

Answer

Answer: (b) steel

---

Question 28.
The SI unit of magnetic dipole moment is’
(a) Ampere
(b) Ampere metre²
(c) Tesla
(d) None of these

Answer

Answer: (b) Ampere metre²

---

Question 29.
Earth’s magnetism was discovered by:
(a) Gauss
(b) Oersted
(c) Ampere
(d) Gilbert

Answer

Answer: (d) Gilbert

---

Question 30.
According to Gauss’s theorem in magnetism, surface integral of magnetic field intensity over a surface (closed or open) is always:
(a) -1
(b) 1
(c) 0
(d) infinity

Answer

Answer: (c) 0

---

Question 31.
Tesla is a unit of:
(a) electric flux
(b) magnetic flux
(c) magnetic field
(d) electric field

Answer

Answer: (c) magnetic field

---

Question 32.
10 eV electron is circulating in a plane at right angle to a uniform field of magnetic induction 10^-1 Wb/m² (1G). The orbital radius of electron is:
(a) 12 cm
(b) 16 cm
(c) 11 cm
(d) 18 cm

Answer

Answer: (c) 11 cm

---

Question 33.
A cyclotron can be used to produce high energy:
(a) neutrons
(b) deutrons
(c) β particles
(d) α partifcles

Answer

Answer: (d) α partifcles

---

Question 34.
The radius of the trajectory of a charged particle in a uniform magnetic field is proportional to the:
(a) charge on the particle
(b) energy of the particle
(c) momentum of the particle
(d) all the above

Answer

Answer: (c) momentum of the particle

---

Question 35.
The force \(\vec{F}\) experienced by a particle of charge q moving with velocity \(\vec{v}\) in a magnetic field \(\vec{B}\) is given by,
(a) \(\vec{F}\) = q(\(\vec{F}\) × \(\vec{B}\))
(b) \(\vec{F}\) = q(\(\vec{B}\) × (\(\vec{b}\))
(c) \(\vec{F}\) = q(\(\vec{v}\) × (\(\vec{B}\))
(d) \(\vec{F}\) = q(\(\vec{v}\) × \(\vec{B}\))

Answer

Answer: (a) \(\vec{F}\) = q(\(\vec{F}\) × \(\vec{B}\))

---

Question 36.
The torque acting on a magnetic dipole of moment \(\vec{p_m}\) when placed in a magnetic field \(\vec{B}\) is:
(a) p_mB
(b) \(\vec{p_m}\) × \(\vec{B}\)
(c) \(\vec{p_m}\)\(\vec{B}\)
(d) \(\frac{p_m}{B}\)

Answer

Answer: (b) \(\vec{p_m}\) × \(\vec{B}\)

---

Question 37.
In thomson spectrograph \(\vec{E}\) ⊥ \(\vec{B}\), then velocity of electron beam will be:
(a) |\(\vec{E}\)|/|\(\vec{B}\)|
(b) \(\vec{E}\) × \(\vec{B}\)
(c) |\(\vec{B}\)|/|\(\vec{E}\)|
(d) E² / B²

Answer

Answer: (a) |\(\vec{E}\)|/|\(\vec{B}\)|

---

We hope the given NCERT MCQ Questions for Class 12 Physics Chapter 4 Moving Charges and Magnetism with Answers Pdf free download will help you. If you have any queries regarding Moving Charges and Magnetism CBSE Class 12 Physics 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 Physics Chapter 6 Electromagnetic Induction with Answers Pdf free download. MCQ Questions for Class 12 Physics with Answers were prepared based on the latest exam pattern. We have provided Electromagnetic Induction Class 12 Physics MCQs Questions with Answers to help students understand the concept very well.

Electromagnetic Induction Class 12 MCQs Questions with Answers

Electromagnetic Induction Class 12 MCQ Question 1.
The coupling co-efficient of the perfectly coupled coils is:
(a) Zero
(b) 1
(c) slightly more than 1
(d) infinite

Answer

Answer: (b) 1

---

Class 12 Physics Chapter 6 MCQ Question 2.
1 henry is equal to :
(a) \(\frac{weber}{ampere}\)
(b) \(\frac{weber}{Volt}\)
(c) weber ampere
(d) None of these

Answer

Answer: (a) \(\frac{weber}{ampere}\)

---

Electromagnetic Induction MCQ Question 3.
The magnetic field is parallel to a surface, then the magnetic flux through the surface is :
(a) zero
(b) small but not zero
(c) infinite
(d) large but not infinite

Answer

Answer: (b) small but not zero

---

MCQ On Electromagnetic Induction Class 12 Question 4.
In the expression e = –\(\frac{d∅}{dt}\), the -ve sign signifies:
(a) The induced emf is produced only when magnetic flux decreases
(b) The induced emf opposes the change in the magnetic flux
(c) The induced emf is opposite to the direction of the flux
(d) None of these

Answer

Answer: (b) The induced emf opposes the change in the magnetic flux

---

Ch 6 Physics Class 12 MCQ Question 5.
An e^– and a p^– are moving parallel to each other in a magnetic field. The magnetic force acting on the p⁺ is:
(a) 1840 times that on e^–
(b) less than that of e^–
(c) same as that of e^–
(d) slightly more than that of e^–

Answer

Answer: (c) same as that of e^–

---

Chapter 6 Physics Class 12 MCQ Question 6.
Which of the following is not equal to a henry?
(a) \(\frac{Volt second}{ampere}\)
(b) \(\frac{Volt second^2}{Coulomb}\)
(c) \(\frac{Volt^2 second}{Coulomb}\)
(d) \(\frac{Jole second}{Coulomb^2}\)

Answer

Answer: (c) \(\frac{Volt^2 second}{Coulomb}\)

---

Electromagnetic Induction MCQs Class 12 Question 7.
A transformer is used to light 100 W and 110 V lamp from a 220 V mains. If the main current is 0.5 A. Then the efficiency of the transformer is:
(a) 11%
(b) 50%
(c) 80%
(d) 90%

Answer

Answer: (d) 90%

---

Physics Class 12 Chapter 6 MCQ Question 8.
The magnetic flux (∅) linked with a coil is related to the number of turns (N) ofthe coil as:
(a) f ∝ N
(b) f ∝ N^-1
(c) f ∝ N²
(d) f ∝ N^-2

Answer

Answer: (a) f ∝ N

---

MCQ Of Electromagnetic Induction Question 9.
The magnetic flux (∅) lined with a coil is related to its area (s) as:
(a) ∅ ∝ s
(b) ∅ ∝ s²
(c) ∅ ∝ s^1/2
(d) ∅ ∝ s^-1/2

Answer

Answer: (a) ∅ ∝ s

---

Class 12 Physics Chapter 6 MCQ Questions Question 10.
If the magnetic flux linked with a coil through which a current off ampere is set up is ∅, then the coefficient of self-inductance of the coil is:
(a) \(\frac{l}{∅}\)
(b) \(\frac{∅}{l}\)
(c) ∅l
(d) None of these

Answer

Answer: (b) \(\frac{∅}{l}\)

---

Class 12 Physics Ch 6 MCQ Question 11.
In a uniform magnetic field B, a wire in the form of a semicircle of radius r rotated about the diameter of the circle with angular frequency ‘ω’. The axis of rotation is perpendicular to the field. If the total resistance of the circuit is R the mean power generated per period of rotation is :
(a) \(\frac{Bπr^2ω}{2R}\)
(b) \(\frac{(Bπr^2ω)^2}{8R}\)
(c) \(\frac{(Bπrω)^2}{2R}\)
(d) \(\frac{(Bπrω^2)^2}{8R}\)

Answer

Answer: (b) \(\frac{(Bπr^2ω)^2}{8R}\)

---

Physics Chapter 6 Class 12 MCQ Question 12.
The role of inductance is equivalent to:
(a) inertia
(b) force
(c) energy
(d) momentum

Answer

Answer: (a) inertia

---

MCQ Questions For Class 12 Physics Chapter 6 Question 13.
A metal conductor of length 1 m rotates vertically about one of its ends at angular velocity 5 rad s^-1 . If the horizontal component of earth’s magnetism is 2 × 10^-5 T, then e.m.f. developed between the two ends of the conductor is:
(a) 5 µV
(b) 50 µV
(c) 5 mV
(d) 50 mV

Answer

Answer: (a) 5 µV

---

Electromagnetic Induction MCQs Question 14.
coil of L = 8.4 mH and R = 6 Ω is connected to a 12 V battery. The current in the coil is 1.0 A at approx’time of:
(a) 500 s
(b) 20 s
(c) 35 ms
(d) 1 ms

Answer

Answer: (d) 1 ms

---

Class 12 Physics Electromagnetic Induction MCQ Question 15.
If I current is flowing inductance L, then the dimension of \(\frac{3}{2}\) LI² is equivalent to:
(a) charge
(b) force
(c) momentum
(d) energy

Answer

Answer: (c) momentum

---

Electromagnetic Induction MCQ Class 12 Question 16.
The phase difference between the flux linkage and the emf in a rotating coil in a uniform magnetic field is:
(a) zero
(b) \(\frac{π}{2}\)
(c) \(\frac{π}{4}\)
(d) π

Answer

Answer: (c) \(\frac{π}{4}\)

---

Class 12 Electromagnetic Induction MCQ Question 17.
A choke is used as a resistance in :
(a) dc circuits
(b) ac circuits
(c) both ac and dc circuits
(d) neither (a) nor (b)

Answer

Answer: (b) ac circuits

---

Chapter 6 Class 12 Physics MCQ Question 18.
The SI unit of magnetic flux is:
(a) T
(b) Tn^-2
(c) Wb
(d) Wb m^-2

Answer

Answer: (c) Wb

---

MCQ Questions On Electromagnetic Induction Class 12 Question 19.
For purely capacitive circuits, power factor is:
(a) 0
(b) -1
(c) 1
(d) infinity

Answer

Answer: (a) 0

---

MCQ Of Chapter 6 Physics Class 12 Question 20.
The magnetic flux linked with a coil is inversely proportional to the?
(a) magnetic field
(b) area of cross section
(c) number of turns
(d) none of these

Answer

Answer: (a) magnetic field

---

Electromagnetic Induction Class 12 MCQ Pdf Download Question 21.
When the magnetic field is parallel to a surface, then the magnetic flux through the surface is:
(a) infinite
(b) zero
(c) small but not zero
(d) large but not infinite.

Answer

Answer: (b) zero

---

Question 22.
The energy stored in a 50 mH inductor carrying a current of 4 A is:
(a) 0.1 J
(b) 0.4 J
(c) 0.04 J
(d) 0.01 J

Answer

Answer: (b) 0.4 J

---

Question 23.
The flux linked with a coif at any instant t is given by ∅ = 10t² – 50t + 250. The induced emf at t = 35 is:
(a) 10 V
(b) 190 V
(c) -190 V
(d) -10 V

Answer

Answer: (d) -10 V

---

Question 24.
Two coils of self inductance 2 mil and 8 mil are placed so close together that the effective flux in one coil is completely linked with other. The mutual inductance between these coils is :
(a) 4 mH
(b) 16 mH
(c) 10 mH
(d) 6 mH

Answer

Answer: (c) 10 mH

---

Question 25.
The core of a transformer is laminated because:
(a) rusting of core may be prevented
(b) ratio of voltage in primary and secondary may be increased.
(c) energy losses due to eddy current may be minimised
(d) The weight of transformer may be reduced

Answer

Answer: (c) energy losses due to eddy current may be minimised

---

We hope the given NCERT MCQ Questions for Class 12 Physics Chapter 6 Electromagnetic Induction with Answers Pdf free download will help you. If you have any queries regarding Electromagnetic Induction CBSE Class 12 Physics 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 12 Aldehydes, Ketones and Carboxylic Acids with Answers Pdf free download. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. We have provided Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well.

Aldehydes, Ketones and Carboxylic Acids Class 12 MCQs Questions with Answers

Aldehydes, Ketones And Carboxylic Acids MCQ With Answers Pdf Class 12 Question 1.
Which of the following reactions will give benzolphenone?
(i) Benzoyl chloride + Benzene + AlCl₃
(ii) Benzoyl chloride + Phenylmagnesium bromide
(iii) Benzoyl chloride + Diphenyl cadmium
(a) (i)and(ii)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (i), (ii) and (iii)

Answer

Answer: (c) (i) and (iii)

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Aldehyde Ketone And Carboxylic Acid MCQ Class 12 Question 2.
Propanone can be prepared from ethyne by
(a) passing a mixture of ethyne and steam over a catalyst, magnesium at 420°C
(b) passing a mixture of ethyne and ethanol over a catalyst zinc chromite
(c) boiling ethyne with water in the presence of HgSO₄ and H₂SO₄
(d) treating ethyne with iodine and NaOH

Answer

Answer: (c) boiling ethyne with water in the presence of HgSO₄ and H₂SO₄

---

MCQ On Aldehydes Ketones And Carboxylic Acids Class 12 Question 3.
The oxidation of toluene to benzaldehyde by chromyl, chloride is called
(a) Etard reaction
(b) Riemer-Tiemann reaction
(c) Wurtz reaction
(d) Cannizzaro’s reaction

Answer

Answer: (a) Etard reaction

---

Aldehydes, Ketones And Carboxylic Acids MCQ With Answers Pdf Download Question 4.
There is a large difference in the boiling points of butanal and butanal-1-oldueto
(a) intermolecular hydrogen bonding in butan-1-ol
(b) intermolecular hydrogen bonding in butanal
(c) higher molecular mass of butan-1-ol
(d) resonance shown by butanal

Answer

Answer: (a) intermolecular hydrogen bonding in butan-1-ol

---

Aldehydes And Ketones Class 12 MCQ  Question 5.
The addition of HCN to carbonyl compounds is an example of
(a) nucleophilic addition
(b) electrophilic addition
(c) free radical addition
(d) electromeric addition

Answer

Answer: (a) nucleophilic addition

---

Aldehydes Ketones And Carboxylic Acids MCQ With Answers Pdf Class 12 Question 6.
Aldehydes other than formaldehyde react with Grignard’s reagent to give addition products which on hydrolysis give
(a) tertiary alcohols
(b) secondary alcohols
(c) primary alcohols
(d) carboxylic acids

Answer

Answer: (b) secondary alcohols

---

MCQ On Aldehyde And Ketone Class 12 Question 7.
Which of the following will not give aldol condensation?
(a) Phenyl acetaldehyde
(b) 2-Methylpentanal
(c) Benzaldehyde
(d) 1-Phenylpropanone

Answer

Answer: (c) Benzaldehyde

---

Class 12 Chemistry Chapter 12 MCQ Question 8.
Which of the following compounds does not react with NaHSO₃?
(a) HCHO
(b) C₆H₅COCH₃
(c) CH₃COCH₃
(d) CH₃CHO

Answer

Answer: (b) C₆H₅COCH₃

---

MCQ Of Aldehyde And Ketone Class 12 Question 9.
Which of the following compounds will ive a coloured crystalline compound with

(a) CH₃COCl
(b) CH₃COOC₂H₅
(c) CH₃COCH₃
(d) CH₃CONH₂

Answer

Answer: (c) CH₃COCH₃

---

MCQs On Aldehydes And Ketones Class 12 Question 10.
The product of hydrolysis of ozonide of 1-butene are
(a) ethanol only
(b) ethanal and methanal
(c) propanal and methanal
(d) methanal only

Answer

Answer: (c) propanal and methanol

---

MCQ Aldehydes And Ketones Class 12 Question 11.
Identify reactant (X) in the given reaction sequence

(a) CH₃MgCl
(b) CH₃COCl +Mg
(c) MgCl₂
(d) CH₃CH₂MgCl

Answer

Answer: (a) CH₃MgCl

---

Aldehydes And Ketones MCQ Class 12 Question 12.
α-Hydroxypropanoic acid can be preapred from ethanal by following the steps given in the sequence
(a) Treat with HCN followed by acidic hydrolysis
(b) Treat with NaHSO₃ followed by reaction with Na₂CO₃
(c) Treat with H₂SO₄ followed by hydrolysis
(d) Treat with K₂Cr₂O₇ in presence of sulphuric acid

Answer

Answer: (a) Treat with HCN followed by acidic hydrolysis

---

Aldehydes Ketones And Carboxylic Acids MCQ Class 12 Question 13.
Which of the following compounds will undergo Cannizzaro reaction?
(a) CH₃CHO
(b) CH₃COCH₃
(c) C₆H₅CHO
(d) C₆H₅CH₂CHO

Answer

Answer: (c) C₆H₅CHO

---

MCQs On Aldehydes Ketones And Carboxylic Acids Class 12 Question 14.
Benzoyl Chloride on reduction with H₂/Pd-BaSO₄ produces
(a) benzoic acid
(b) benzyl alochol
(c) benzoyl sulphate
(d) benzaldehyde

Answer

Answer: (d) benzaldehyde

---

Aldehyde Ketone And Carboxylic Acid MCQ Pdf Download Class 12 Question 15.
What is the test to differentiate between penta-2-one and pentan-3-one?
(a) Iodoform test
(b) Benedict’s test
(c) Fehling’s test
(d) Aldol condensation test

Answer

Answer: (a) Iodoform test

---

Aldehydes And Ketones MCQ Pdf Class 12 Question 16.
Which of the following does not undergoCannizzarro’s reaction?
(a) Benzaldehyde
(b) 2-Methylpropanal
(c) p-Methoxybenzaldehyde
(d) 2, 2-Dimethylpropanal

Answer

Answer: (b) 2-Methylpropanal

---

Question 17.
Aldehydes that do not undergo aldol condensation are
1. propanal
2. trichloroethanal
3. 2-phenylethanal
4. fethanal
5. benzaldehyde
(a) 3 and 4 only
(b) 2 and 5 only
(c) 1, 2 and 3 only
(d) 2, 3 and 5 only

Answer

Answer: (b) 2 and 5 only

---

Question 18.
The best oxidising agent- for oxidation of
CH₃-CH = CH-CHO to CH₃-CH = CH-COOH is
(a) Baeyefs reagent
(b) Tollen’s reagent
(c) SchifFs reagent
(d) Acidified dichromate

Answer

Answer: (b) Tollen’s reagent

---

Question 19.
Study the given reaction and identify the process which is carried out

(a) It is used for purification of aldehydes and ketones
(b) It is used to distinguish aldehydes from ketones
(c) It is used to prepare cyclic aldehydes and ketones
(d) It is used to study polar nature of aldehydes and ketones

Answer

Answer: (a) It is used for purification of aldehydes and ketones

---

Question 20.
Hydrocarbons are formed when aldehydes and ketones are reacted with amalgamated zinc and conc. HCl. The reaction is called
(a) Cannizzaro reaction
(b) Clemmensen reduction
(c) Rosenmund reduction
(d) Wolff-Kishner reduction

Answer

Answer: (b) Clemmensen reduction

---

Question 21.
In the following sequence of reaction, the final product (Z) is

(a) ethanal
(b) propan-2-ol
(c) propanone
(d) propan-2-ol

Answer

Answer: (c) propanone

---

Question 22.
In order of reactivity of CH₃CHO, CH₃COC₂H₅ and CH₃COCH₃ is
(a) CH₃CHO > CH₃COCH₃ > CH₃COC₂H₅
(b) C₂H₅COCH₃ > CH₃COCH₃ > CH₃CHO
(c) CH₃COCH₃ > CH₃CHO > C₂H₅COCH₃
(d) CH₃COCH₃ > C₂H₅COCH₃ > CH₃CHO

Answer

Answer: (a) CH₃CHO > CH₃COCH₃ > CH₃COC₂H₅

---

Question 23.
The final product (Y) in the following sequence of chemical reaction is

(a) An alkene
(b) a carboxylic acid
(c) an aldehyde
(d) sodium salt of carboxylic acid

Answer

Answer: (d) sodium salt of carboxylic acid

---

Question 24.
Which of the following reagents are not correctly matched with the reaction?
(a) CH₃CH = CHCHO → CH₃CH = CHCOOH : Ammoniacal AgNO₃
(b) CH₃CH = CHCHO → CH₃CH = CHCH₂OH : H₂/Pt
(c) R-COOH → R-CH₂CH : NaBH₄
(d) CH₃CH₂COCl → CH₃CH₂CHO : H₂Pd/BaSO₄

Answer

Answer: (b) CH₃CH = CHCHO → CH₃CH = CHCH₂OH : H₂/Pt

---

Question 25.
Which among the following is most reactive to give nucleophilic addition?
(a) FCH₂CHO
(b) ClCH₂CHO
(c) BrCH₂CHO
(d) ICH₂CHO

Answer

Answer: (a) FCH₂CHO

---

Question 26.

The product (X) will be

Answer

Answer: (c)

---

Question 27.
Find the product of the given reaction

Answer

Answer: (b)

---

Question 28.
When propanal reacts with 2-methylpropanal in presence of NaOH, four different products are formed. The reaction is known as
(a) Aldol condensation
(b) Cross aldol condensation
(c) Cannizzaro reaction
(d) HVZ condensation

Answer

Answer: (b) Cross aldol condensation

---

Question 29.
Which of the following does not answer iodoform test?
(a) n-Butyl alcohol
(b) sec-Butyl alcohol
(c) Acetophenone
(d) Acetaldehyde

Answer

Answer: (a) n-Butyl alcohol

---

Question 30.
Which of the following is the most.reactive isomer?

Answer

Answer: (a)

---

Question 31.
To differentiate between pentan-2-one and penta-3-one a test is carried out. Which of the following is the correct answer?
(a) Pentan-2-one will give silver mirror test
(b) Pentan-2-one will give iodoform test
(c) Pentan-3-one will give iodoform test
(d) None of these

Answer

Answer: (b) Pentan-2-one will give iodoform test

---

Question 32.
Fill in the reagents for the given conversation:

Answer

Answer: (a)

---

Question 33.
Which compound is obtained when acetaldehydes are treated with dilute solution of caustic soda?
(a) Sodium acetate
(b) Resinous mass
(c) Aldol
(d) Ethyl acetate

Answer

Answer: (c) Aldol

---

Question 34.
Identify the products (X) and (Y) in the given reaction

(a) X = Acetophenone, Y = m-N itroacetophone
(b) X = Toluene, Y = m-Nitroacetotoluene
(c) X = Acetophenone, Y = o- and p-Dinitroacetophenone
(d) X = Benzaldehyde, Y = m-Nitrobenzaldehyde

Answer

Answer: (a) X = Acetophenone, Y = m-N itroacetophone

---

Question 35.
Which of the following compound will undergo self aldol condensation in the presence of cold dilute alkali?
(a) CH ≡ C-CHO
(b) CH₂ = CHCHO
(c) C₆H₅CHO
(d) CH₃CH₂CHO

Answer

Answer: (d) CH₃CH₂CHO

---

We hope the given NCERT MCQ Questions for Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids with Answers Pdf free download will help you. If you have any queries regarding Aldehydes, Ketones and Carboxylic Acids 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 11 Alcohols, Phenols and Ethers with Answers Pdf free download. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. We have provided Alcohols, Phenols and Ethers Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well.

Alcohols, Phenols and Ethers Class 12 MCQs Questions with Answers

Alcohol Phenol And Ether MCQ Question 1.
Which of the following alcohols gives 2-butenc on dehydration byconc. H₂SO₄?
(a) 2-methyl propene-2-ol
(b) 2-methyl 1 -propanol
(c) Butane-2-ol
(d) Butane 1-ol

Answer

Answer: (c) Butane-2-ol

---

Alcohol Phenol And Ether MCQ Class 12 Question 2.
One mole of ethyl acetate on tatment with an excess of LiAlH₄ in dry ether and subsequent acidification produces
(a) 1 mole acetic acid + 1 mole ethyl alcohol
(b) 1 mole ethyl alcohol + 1 mole methyl alcohol
(c) 2 moles of ethyl alcohol
(d) 1 mole of 2-butanol

Answer

Answer: (c) 2 moles of ethyl alcohol

---

Alcohol Phenol And Ether MCQ With Answers Pdf Question 3.
Which of the following reagents can not, be used to oxidise primary alcohols to aldehydes?
(a) CrO₃ in anhydrous medium
(b) KMnO₄ in acidic medium
(c) Pyridinium chlorochromate
(d) Heat in the presence of Cu at 573 K

Answer

Answer: (b) KMnO₄ in acidic medium

---

Alcohols Phenols And Ethers Class 12 MCQ Question 4.
1-Phenylethanol can be prepared by the reaction of benzaldehyde with
(a) methyl bromide
(b) ethyl iodide and magnesium
(c) methyl iodide and magnesium (Grignard reagent’s)
(d) methyl bromide and aluminium bromide

Answer

Answer: (c) methyl iodide and magnesium (Grignard reagent’s)

---

Alcohol Phenol Ether Class 12 MCQ Question 5.
Which of the following alcohols will give the most stable carbocation during dehydration?
(a) 2-methyl-1-propanol
(b) 2-methyl-2-propanol
(c) 1-Butanol
(d) 2-Butanol

Answer

Answer: (b) 2-methyl-2-propanol

---

MCQ On Alcohol Phenol And Ether Question 6.
A compound X with the molecular formula C₂H₈O can be oxidised to another compound Y whose molecular formulae is C₃H₆O₂. The compound X may be
(a) CH₃CH₂OCH₃
(b) CH₃CH₂CHO
(c) CH₃CH₂CH₂OH
(d) CH₃CHOHCH₃

Answer

Answer: (c) CH₃CH₂CH₂OH

---

MCQ Of Alcohol Phenol And Ether Question 7.
Order of esterification of alcohols are
(a) 3° > 1° > 2°
(b) 2°> 3° > 1°
(c) 1 ° > 2° > 3°
(d) None of these

Answer

Answer: (c) 1 ° > 2° > 3°

---

Alcohols Phenols And Ethers MCQs Question 8.
What happens when tertiary butyl alcohol is passed over heated copper at 300°C?
(a) Secondary butyl alcohol is formed
(b) 2-methylpropene is formed
(c) 1-butene is formed
(d) Butanol is formed

Answer

Answer: (b) 2-methylpropene is formed

---

Alcohol Phenol And Ether MCQ With Answers Question 9.
Which of the follow ing compounds will be most easily attacked by an electrophile?

Answer

Answer: (c)

---

Class 12 Chemistry Chapter Alcohol Phenol And Ether MCQ Question 10.

In the reaction, X is
(a) (CH₃)₂C = CHCH₃
(b) CH₃C = CH
(c) (CH₃)₂CHCH₂CH₃

Answer

Answer: (a) (CH₃)₂C = CHCH₃

---

Ans. a
MCQ Questions On Alcohol Phenol And Ether Question 11.
What would be the reactant and reagent used to obtain 2, 4-dimenthyl pentan-3-ol?
(a) Propanal and propyl magnesium bromide
(b) 3-methylbutanal and 2-methyl magnesium iodide
(c) 2-dimethylpropanone and methyl magnesium odide
(d) 2-methylpropanal and isopropyl magnesium iodide

Answer

Answer: (d) 2-methylpropanal and isopropyl magnesium iodide

---

Alcohols Phenols And Ethers Class 12 MCQ Questions Question 12.
The decreasing order of boiling point of the following alcohols is
(a) 3-methylbuan-2-ol > 2-methylbutan-2-ol > pentan-1-ol
(b) Pentan-1-ol > 3-methylbutan-2-ol > 2-methylbutan-2-ol
(c) 2-methylbutan-2-ol > 3-methylbutan-2-ol > pentan-1-ol
(d) 2-methylbutan-2-ol > pental-1-ol > 3-methylbutan-2-ol

Answer

Answer: (b) Pentan-1-ol > 3-methylbutan-2-ol > 2-methylbutan-2-ol

---

Alcohols Phenols And Ethers MCQ Question 13.
Acid catalysed dehydration of t-butanol is faster than that of n-butanol because
(a) tertiary carbocation is more stable than primary carbocation
(b) primary carbocation is more stable than tertiary carbocation
(c) t-butanol has a higher boiling point
(d) rearrangement takes place during dehydration of t- butanol

Answer

Answer: (a) tertiary carbocation is more stable than primary carbocation

---

MCQs On Alcohols Phenols And Ethers Question 14.
An unknown alcohol is treated with “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism?
(a) Tertiary alcohol by S_N²
(b) Secondary alcohol by S_N¹
(c) Tertiary alcohol by S_N¹
(d) Secondary alcohol by S_N²

Answer

Answer: (c) Tertiary alcohol by S_N¹

---

MCQ Alcohol Phenol Ether Class 12 Question 15.
An alcohol X when treated with hot cone. H₂SO₄ gave an alkene Y with formula C₄H₈. This alkene on ozonolysis gives single product with molecular formula C₂H₄O. The alcohol is
(a) butan-1-ol,
(b) butan-2-ol
(c) 2-methylpropan-1-ol
(d) 2,2-dimethylbutynal-1-oI

Answer

Answer: (b) butan-2-ol

---

MCQ Questions On Alcohols Phenols And Ethers Question 16.
Which of the following alcohols reacts most readily with Lucas reagent?
(a) CH₃CH₂CH₂OH

Answer

Answer: (c)

---

MCQ Alcohol Phenol And Ether Question 17.
Propanone on reaction with alkyl magnesium bromide followed by hydrolysis will produce
(a) primary alcohol
(b) secondary alcohol
(c) tertiary alcohol
(d) carboxylic acid

Answer

Answer: (c) tertiary alcohol

---

Alcohol Phenol And Ether MCQ With Answers Pdf Download Question 18.
Vapours of an alcohol X when passed over hot reduced copper, produce an alkene, the alcohol is
(a) primary alcohol
(b) secondary alcohol
(c) tertiary alcohol
(d) dihydric alcohol

Answer

Answer: (c) tertiary alcohol

---

MCQ Questions For Class 12 Chemistry Chapter 11 Question 19.
Phenol when treated with excess of bromine water gives a white precipitate of
(a) 2, 4, 6-tribromophenol
(b) o-bromophenol
(c) p-bromophenol
(d) bromobenzene

Answer

Answer: (a) 2, 4, 6-tribromophenol

---

Class 12 Alcohols Phenols And Ethers MCQ Question 20.
Picricacid is a yellow coloured compound. Its chemical name is
(a) m-nitrobenzoic acid
(b) 2, 4, 6-trinitropheriol
(c) 2, 4, 6-tribromophenol
(d) p-nitrophenol

Answer

Answer: (b) 2, 4, 6-trinitropheriol

---

Question 21.
Ortho-nitrophenol is less soluble in water than, p- and m- nitrophenols because
(a) o-nitrophenol shows intramolecular H-bonding
(b) o-nitrophenol shows intermolecular H-bonding
(c) melting point of o-nitrophenol is lower than those of m- and p-isomers
(d) o-nitrophenol is more volatile in steam than those of m- and p-isomers

Answer

Answer: (a) o-nitrophenol shows intramolecular H-bonding

---

Question 22.
The best reagent to convert pent-3-en-2-ol into pent-3-en- 2-one is
(a) acidic permanganate
(b) acidic dichromate
(c) chromic anhydride in glacial acetic acid
(d) pyridiriium chlorochromate

Answer

Answer: (d) pyridiriium chlorochromate

---

Question 23.
Identify the final product of the reaction sequence.

(a) Benzophenone
(b) Acetophenone
(c) Diphenyl
(d) Methyl salicylate

Answer

Answer: (b) Acetophenone

---

Question 24.
Arrange the following alcohols in order of increasing reactivity towards sodium metal.
(i) (CH₃)₃C-OH
(ii) (CH₃)₂CH-OH
(iii) CH₃CH₂OH
(a) (iii) < (ii) < (i)
(b) (ii) > (i) < (iii)
(c) (i) < (ii) < (iii)
(d) (iii) < (i) < (ii)

Answer

Answer: (c) (i) < (ii) < (iii)

---

Question 25.
The reaction between phenol and chloroform in the presence of aqueous NaOH is
(a) nucleophilic substitution reaction
(b) electrophilic addition reaction
(c) electrophilic substitution reaction
(d) nucleophilic addition reaction

Answer

Answer: (c) electrophilic substitution reaction

---

Question 26.
The most suitable reagent for the conversion of RCH₂OH → RCHO is
(a) K₂Cr₂O₇
(b) CrO₃
(c) KMnO₄
(d) PCC

Answer

Answer: (d) PCC

---

Question 27.
In the following reaction sequence Z is

(a) butan-1-ol
(b) butan-2-ol
(c) 2-methylpropan-2-ol
(d) 1, 1-dimethylethanol

Answer

Answer: (c) 2-methylpropan-2-ol

---

Question 28.
The major product of acid catalysed dehydration of 2-methylcyclohexanol and butan-1-ol are respectively
(a) 1 -methylcyclohexene andbut-1-ene
(b) 2-methylcyclohexene and but-2-ene
(c) 2-methylcyclohexene and butane
(d) 1-methylcyclohexene and but-2-ene

Answer

Answer: (a) 1 -methylcyclohexene andbut-1-ene

---

Question 29.
Tertiary butyl alcohol gives tertiary butyl chlorideon treatment with
(a) Conc HCl/anhydrous ZnCl₃
(b) KCN
(c) NaOCl
(d) Cl₂

Answer

Answer: (a) Conc HCl/anhydrous ZnCl₃

---

Question 30.
Which of the following alcohol is dehydrated most easily with cone. H₂SO₄?
(a) p-O₂NC₆H₄CH(OH)CH₃
(b) p-ClC₆H₄CH(OH)CH₃
(c) p-CH₃OC₆H₄CH(OH)CH₃
(d) C₆H₅CH(OH)CH₃

Answer

Answer: (c) p-CH₃OC₆H₄CH(OH)CH₃

---

Question 31.
Conversion of phenol to salicyclic acid and to salicyaldehyde are known as (respectively)
(a) Reimer-Tiemann reaction and Kolbe’s reaction
(b) Williamson’s synthesis and Hydrobration-oxidation
(c) Kolbe’s reaction and Williamson’s synthesis
(d) Kolbe’s reaction and Reimer-Tiemann reaction

Answer

Answer: (d) Kolbe’s reaction and Reimer-Tiemann reaction

---

Question 32.
Which of the following is phenol?
(a) Cresol
(b) Catechol
(c) Benzenol
(d) All of these

Answer

Answer: (d) All of these

---

Question 33.
Benzoquinone is prepared by reaction of phenol with
(a) Na₂Cr₂O₇, H₂SO₄
(b) KMnO₄, H₂SO₄
(c) Na₂CrO₄,HCl
(d) K₂MnO₄, H₂SO₄

Answer

Answer: (a) Na₂Cr₂O₇, H₂SO₄

---

Question 34.
Which of the following compounds will give tribromo derivative on treatment with bromine water?

Answer

Answer: (b)

---

Question 35.
The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is
(a) benzoic acid
(b) salicyaldehyde
(c) salicylic acid
(d) phthalic acid

Answer

Answer: (c) salicylic acid

---

We hope the given NCERT MCQ Questions for Class 12 Chemistry Chapter 11 Alcohols, Phenols and Ethers with Answers Pdf free download will help you. If you have any queries regarding Alcohols, Phenols and Ethers 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 Physics Chapter 11 Dual Nature of Radiation and Matter with Answers Pdf free download. MCQ Questions for Class 12 Physics with Answers were prepared based on the latest exam pattern. We have provided Dual Nature of Radiation and Matter Class 12 Physics MCQs Questions with Answers to help students understand the concept very well.

Dual Nature of Radiation and Matter Class 12 MCQs Questions with Answers

Dual Nature Of Radiation And Matter MCQ Question 1.
De-Broglie equation states the:
(a) dual nature
(b) particle nature
(c) wave nature
(d) none of these

Answer

Answer: (a) dual nature

---

MCQ On Dual Nature Of Matter And Radiation Question 2.
Protons and alpha particles have the same de-Broglie wavelength. What is same for both of them ?
(a) Energy
(b) Time period
(c) Frequency
(d) Momentum

Answer

Answer: (d) Momentum

---

Dual Nature Of Radiation And Matter MCQ Questions With Answers Pdf Question 3.
Kinetic energy of emitted electrons depends upon :
(a) frequency
(b) intensity
(c) nature of atmosphere surrounding the electrons
(d) none of these

Answer

Answer: (a) frequency

---

Dual Nature Of Radiation And Matter MCQ Questions With Answers Pdf Download Question 4.
De-Broglie wavelength of a body of mass m and kinetic energy E is given by (symbols have their usual meanings):
(a) \(\frac{h}{\sqrt{2mE}}\)
(b) \(\frac{h}{2mE}\)
(c) \(\frac{\sqrt{2mE}}{h}\)
(d) \(\frac{h}{mE}\)

Answer

Answer: (a) \(\frac{h}{\sqrt{2mE}}\)

---

Dual Nature Of Matter And Radiation Class 12 MCQ Question 5.
The ratio of specific charge of an alpha particle to the proton is:
(a) 1 : 2
(b) 2 : 1
(c) 4 : 1
(d) 1 : 4

Answer

Answer: (a) 1 : 2

---

MCQs On Dual Nature Of Radiation And Matter Question 6.
In Thomson’s experiment number of parabola gives :
(a) the no. of electrons present in element
(b) the no. of proton present in element
(c) the no. of neutrons present in element
(d) the no. of isotopes of the element present

Answer

Answer: (d) the no. of isotopes of the element present

---

MCQ Of Dual Nature Of Radiation And Matter Question 7.
The work function of photoelectric material is 3.3 eV. The threshold frequency will be equal to:
(a) 8 × 10¹⁴ Hz
(b) 8 × 10¹⁰ Hz
(c) 5 × 10¹⁰ Hz
(d) 4 × 10¹⁴ Hz

Answer

Answer: (a) 8 × 10¹⁴ Hz

---

Question 8.
The strength of photoelectric current depends upon :
(a) angle of incident radiation
(b) frequency of incident radiation
(c) intensity of incident radiation
(d) distance between anode and cathode

Answer

Answer: (b) frequency of incident radiation

---

Question 9.
The momentum of an electron that emits a wavelength of 2 Å. will be:
(a) 6.4 × 10^-36 kgms^-1
(b) 3.3 × 10^-24 kgms^-1
(c) 3.3 × 10^-34 kgms^-1
(d) none of these

Answer

Answer: (b) 3.3 × 10^-24 kgms^-1

---

Question 10.
Name the scientists who first studied the passage of electricity through fluids to establish the electrical nature of matter:
(a)Millikan
(b) Planck
(c) Faraday
(d) Boyle

Answer

Answer: (c) Faraday

---

Question 11.
Millikan’s oil drop experiment makes use of:
(a) Stokes’ law
(b) Boyle’s law
(c) Gas equation
(d) Bernoulli’s theorem

Answer

Answer: (a) Stokes’ law

---

Question 12.
X-rays are:
(a) deflected by an electric field
(b) deflected by a magnetic field
(c) deflected by both electric and magnetic fields
(d) not deflected by electric and magnetic fields

Answer

Answer: (d) not deflected by electric and magnetic fields

---

Question 13.
In photo electric emission, for alkali metals the threshold frequency lies in the:
(a) visible region
(b) ultraviolet region
(c) infrared region
(d) far end of the infrared region

Answer

Answer: (a) visible region

---

Question 14.
Which of the following radiations cannot eject photo electrons?
(a) ultraviolet
(b) infrared
(c) visible
(d) X-rays

Answer

Answer: (b) infrared

---

Question 15.
What is the de-Broglie wavelength of an electron accelerated from rest through a potential difference of V volts?
(a) \(\frac{12.3}{V^2}\) Å
(b) \(\frac{12.3}{V}\) Å
(c) \(\frac{12.2}{V^2}\) Å
(d) None of these

Answer

Answer: (a) \(\frac{12.3}{V^2}\) Å

---

Question 16.
What is the de-Broglie wavelength of an electron accelerated from rest through a potential difference of 100 volts?
(a) 12.3 Å
(b) 1.23 Å
(c) 0.123 Å
(d) None of these

Answer

Answer: (b) 1.23 Å

---

Question 17.
What is the de-Broglie wavelength of a proton accelerated from rest through a potential difference of V volts?
(a) \(\frac{12.3}{√V}\) Å
(b) \(\frac{12.3}{V}\) Å
(c) \(\frac{12.2}{V^2}\) Å
(d) None of these

Answer

Answer: (d) None of these

---

Question 18.
When a yellow light is incident on a surface, no electrons are emitted while green light can emit electrons. If the red light is incident on the surface then:
(a) no electrons are emitted
(b) photons are emitted
(c) electrons of higher energy are emitted
(d) electrons of lower energy are emitted

Answer

Answer: (a) no electrons are emitted

---

Question 19.
The de-Broglie wavelength of particle of mass 1 mg moving with a velocity of 1 ms^-1, in terms of Planck’s constant h, is given by (in metre):
(a) 10⁵ h
(b) 10⁶ h
(c) 10^-3 h
(d) 10³ h

Answer

Answer: (b) 10⁶ h

---

Question 20.
Evidence of the wave nature of light cannot be obtained from:
(a) diffraction
(b) interference
(c) doppler effect
(d) reflection

Answer

Answer: (d) reflection

---

Question 21.
which Characteristic of a target does the Mosley’s law relate the frequency of X-rays?
(a) density
(b) atomic number
(c) atomic weight
(d) interatomic space

Answer

Answer: (b) atomic number

---

Question 22.
The charge of a photo electron is :
(a) 9.1 × 10^-31 C
(b) 9.1 × 10^-27 C
(c) 9.1 × 10^-24 C
(d) none of these

Answer

Answer: (d) none of these

---

Question 23.
The number of photons of frequency n present in energy E, in terms of Planck’s constant h:
(a) \(\frac{E}{nh}\)
(b) nhE
(c) \(\frac{nh}{E}\)
(d) \(\frac{nE}{h}\)

Answer

Answer: (a) \(\frac{E}{nh}\)

---

Question 24.
Compared to liquids and solids, gases are:
(a) good conductors of electricity
(b) best conductors of electricity
(c) very poor conductors of electricity
(d) good or bad conductors of electricity depending upon the nature of the gas

Answer

Answer: (c) very poor conductors of electricity

---

Question 25.
The different stages of discharge in a discharge tube can be explained on the basis of:
(a) the wave nature of light
(b) the dual nature of light
(c) wave nature of electrons
(d) the collision between the charged particles emitted from the cathode the atoms of the gas in the tube

Answer

Answer: (d) the collision between the charged particles emitted from the cathode the atoms of the gas in the tube

---

Question 26.
When an electron jumps across a potential difference of 1 V, it gains energy equal to :
(a) 1.602 × 10^-19 J
(b) 1.602 × 10¹⁹ J
(c) 1.602 × 10²⁴ J
(d) 1 J

Answer

Answer: (a) 1.602 × 10^-19 J

---

We hope the given NCERT MCQ Questions for Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter with Answers Pdf free download will help you. If you have any queries regarding Dual Nature of Radiation and Matter CBSE Class 12 Physics 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 14 Biomolecules with Answers Pdf free download. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. We have provided Biomolecules Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well.

Biomolecules Class 12 MCQs Questions with Answers

Biomolecules Class 12 MCQ Question 1.
During acetylation of glucose it needs ,v moles of.acetic anhydride. The value of x would be
(a) 3
(b) 5
(c) 4
(d) 1

Answer

Answer: (b) 5

---

Biomolecules MCQs Class 12 Question 2.
On oxidation with a mild oxidising agent like Br₂/H₂0, the glucose is oxidized to
(a) saccharic acid
(b) glucaric acid
(c) gluconic acid
(d) valeric acid

Answer

Answer: (c) gluconic acid

---

Biomolecules Class 12 Chemistry MCQ Question 3.
Invert sugar is
(a) a type of cane sugar
(b) optically inactive form of sugar
(c) mixture of glucose and galactose
(d) mixture of glucose and fructose in equimolar quantities

Answer

Answer: (d) mixture of glucose and fructose in equimolar quantities

---

MCQ Of Biomolecules Class 12 Question 4.
Which of the following compounds is found abundatly in nature?
(a) Fructose
(b) Starch
(c) Glucose
(d) Cellulose

Answer

Answer: (b) Starch or (d) Cellulose

---

MCQ On Biomolecules Class 12 Question 5.
Glycosidic linkage is an
(a) amide linkage
(b) ester linkage
(c) ether linkage
(d) acetyl linkage

Answer

Answer: (c) ether linkage

---

Class 12 Chemistry Biomolecules MCQ Question 6.
Starch is composed of two polysaccharides which arc
(a) amylopectin and glycogen
(b) amylose and gtycogen
(c) amylose (20%) and amylopectin (80%)
(d) cellulose and glycogen

Answer

Answer: (c) amylose (20%) and amylopectin (80%)

---

Class 12 Biomolecules MCQs Question 7.
Which reagent is used to convert glucose into saccharic acid?
(a) Br₂/H₂O
(b) Nitric acid
(c) Alkaline solution of iodine
(d) Ammonium hydroxide

Answer

Answer: (b) Nitric acid

---

Biomolecules MCQ Class 12 Question 8.
Maltose is made up of
(a) two α-D-glucose
(b) normal β-D-glucose
(c) α- and β-D-glucose
(d) fructose

Answer

Answer: (a) two α-D-glucose

---

MCQ Questions On Biomolecules Class 12 Question 9.
What is the basic formulae for starch?
(a) (C₆H₁₂O₆)_n
(b) (C₆H₁₀O₅)_n
(c) C₁₂O₁₂O₁₁
(d) (C₆H₁₂O₄)_n

Answer

Answer: (b) (C₆H₁₀O₅)_n

---

MCQ Biomolecules Class 12 Question 10.
Whicn of the following is an example of an aldopentose?
(a) D-Ribose
(b) Glyceraldehyde
(c) Fructose
(d) Erythrose

Answer

Answer: (a) D-Ribose

---

Class 12 Biomolecules MCQ Question 11.

Identify Z.
(a) 2-lodoheptane
(b) Heptane-2-ol
(c) 2-lodohexane
(d) Heptanoic acid

Answer

Answer: (d) Heptanoic acid

---

Biomolecules Class 12 MCQs Question 12.
Which of the following treatment will convert starch directly into glucose?
(a) Heating with dilute H₂SO₄
(b) Fermentation by diastase
(c) Fermentation by zymase
(d) Heating with dilute NaOH

Answer

Answer: (a) Heating with dilute H₂SO₄

---

MCQs Of Biomolecules Class 12 Question 13.
The general formula of carbohydrates is
(a) C_nH_2n+1O
(b) C_nH_2nO
(c) C_x(H₂O)
(d) C_n(H₂,O)_2n

Answer

Answer: (c) C_x(H₂O)

---

Biomolecules Class 12 MCQ Questions Question 14.
The a-and p-forms of glucose are
(a) isomers of D (+) glucose and L (-) glucose respectively
(b) diastereomers of glucose
(c) anomers of glucose
(d) isomers which differ in the configuration of C-2

Answer

Answer: (c) anomers of glucose

---

Class 12 Chemistry Chapter 14 MCQ Question 15.
What are the hydrolysis products of sucrose?
(a) Fructose + Fructose
(b) Glucose + Glucose
(c) Glucose + Galactose
(d) D-Glucose + D-Fructose

Answer

Answer: (d) D-Glucose + D-Fructose

---

MCQs On Biomolecules Chemistry Class 12 Question 16.
Carbohydrates are stored in human body as the polysaccharide
(a) starch
(b) glycogen
(c) cellulose
(d) amylose

Answer

Answer: (b) glycogen

---

Chemistry Biomolecules Class 12 MCQ Question 17.
The glycosidic linkage involved in linking the glucose units in amylose part of starch is
(a) C₁-C₄ β-linkage
(b) C₄-C₆ β-linkage
(c) C₁-C₆ α-linkage
(d) C₁-C₄ α-linkage

Answer

Answer: (d) C₁-C₄ α-linkage

---

Biomolecules Class 12 Chemistry MCQs Question 18.
The conversion of maltose into glucose is possible by the enzyme
(a) zymase
(b) lactase
(c) maltase
(d) diastase

Answer

Answer: (c) maltase

---

MCQ Of Chapter Biomolecules Class 12 Question 19.
Which of the following is a non-reducing sugar?
(a) Glucose
(b) Sucrose
(c) Maltose
(d) Lactose

Answer

Answer: (b) Sucrose

---

Biomolecules Chemistry MCQ Question 20.
Which one of the following is not correct?
(a) D(-) Fructose exist sin furanose structure
(b) D (+) Glucose exists in pyranose structure
(c) In sucrose the two monosaccharides are held together by peptide linkage
(d) Maltose is a reducing sugar

Answer

Answer: (c) In sucrose the two monosaccharides are held together by peptide linkage

---

Question 21.
In cellulose, D-glucose units are joined by
(a) α-1, 4 glycosidic linkage
(b) β-1, 6 glycosidic linkage
(c) β-1, 4 glycosidic linkage
(d) peptide linkage

Answer

Answer: (c) β-1, 4 glycosidic linkage

---

Question 22.
The anomeric carbon in D (+) glucose is
(a) C-1 carbon
(b) C-2 carbon
(c) C-5 carbon
(d) C-6 carbon

Answer

Answer: (a) C-1 carbon

---

Question 23.
Glucose Product is
(a) hexanoic acid
(b) gluconic acid
(c) saccharic acid
(d) bromohexane

Answer

Answer: (b) gluconic acid

---

Question 24.
How many C-atoms are there is a pyranose ring?
(a) 3
(b) 5
(c) 6
(d) 7

Answer

Answer: (c) 6

---

Question 25.
Cellulose is a
(a) hexapolysaccharide
(b) pentapolysaccharide
(c) tripolysaccharide
(d) None of these

Answer

Answer: (d) None of these

---

Question 26.
The letter ‘D’ in carbohydrates signifies
(a) dextrorotatory
(b) configuration
(c) diamagnetic nature
(d) mode of synthesis

Answer

Answer: (b) configuration

---

Question 27.
A diabetic person carries a packet of glucose with him always, because
(a) glucose increases the blood sugar level slowly
(b) glucose reduces the blood sugar level
(c) glucose increases the blood sugar level almost instantaneously
(d) glucose reduces the blood sugar level slowly

Answer

Answer: (c) glucose increases the blood sugar level almost instantaneously

---

Question 28.
Among the naturally occurring carbohydrates, furanose ring is found in the
(a) Glucose unit of cane sugar
(b) Glucose unit of cellulose
(c) Fructose unit of cane sugar
(d) Galactose unit of lactose

Answer

Answer: (c) Fructose unit of cane sugar

---

Question 29.
The given structure (I) and (II) represent configuration of the simplest sugar glyceraldehyde. Which of the following statements is not correct for the structures?

(a) I represents D-form while II represents L-form of glyceraldehyde
(b) The sugars having same configuration as D- glyceraldehyde are designated as D-sugars
(c) Natural glucose and fructose are D-forms
(d) D is dextrorotatory while L is laevorotatory enatiomer

Answer

Answer: (d) D is dextrorotatory while L is laevorotatory enatiomer

---

Question 30.
Amino acids generally exist in the form of Z witter ions. This means they contain
(a) Basic – NH₂ group and acidic – COOH group
(b) The basic – NH₃ group and acidic – COO^– group
(c) Basic -NH₂ and acidic – H⁺ group
(d) Basic – COO^– group and acidic – NH₃ group

Answer

Answer: (d) Basic – COO^– group and acidic – NH₃ group

---

Question 31.
Globular proteins are present in
(a) blood
(b) eggs
(c) milk
(d) all of these

Answer

Answer: (d) all of these

---

Question 32.
Which one of the amino acids can be synthesised in the body?
(a) Alanine
(b) Lysine
(c) Valine
(d) Histidine

Answer

Answer: (a) Alanine

---

Question 33.
Which of the following is not true about amino acids?
(a) They are constituents of all proteins
(b) Alanine having one amino and one carboxylic group
(c) Most naturally occurring amino acids have D-configuration
(d) Glycine is the only naturally occuring amino acid which is optically inactive.

Answer

Answer: (c) Most naturally occurring amino acids have D-configuration

---

Question 34.
A compound which contains both ………… and ………… is called amino acid. The amino acids is polypeptide chain are joined by ………/ bonds.
(a) amino, carboxylic group, ester
(b) amino, carboxylic group, peptide
(c) nitrogen, carbon, glycosidic
(d) hydroxy, carboxylic group, peptide

Answer

Answer: (b) amino, carboxylic group, peptide

---

Question 35.
Denaturation of protein leads to loss of its biological activity by
(a) formation of amino acids
(b) loss of primary structure
(c) loss of both primary and secondary structure
(d) loss of both secondary and tertiary structures

Answer

Answer: (d) loss of both secondary and tertiary structures

---

Question 36.
Proteins are condensation polymers of
(a) α-amino acids
(b) β-amino acids
(c) α-hydroxy acids
(d) β-hydroxy acids

Answer

Answer: (a) α-amino acids

---

Question 37.
Mark the wrong statement about denaturation of proteins
(a) The primary structure of the protein does not change
(b) Globular proteins are converted into fibrous proteins
(c) Fibrous proteins are converted into globular proteins
(d) The biological activity of the protein is destroyed

Answer

Answer: (c) Fibrous proteins are converted into globular proteins

---

Question 38.
In fibrous proteins, polypeptide chains are held together
(a) van der waals forces
(b) electrostatic forces of attraction
(c) hydrogen bonds
(d) covalent bonds

Answer

Answer: (c) hydrogen bonds

---

Question 39.
Which type of interactions are responsible for making the a-helix structure stable?
(a) Peptide bonds between -NH₂ and -CO groups of adjacent carbon chain
(b) Hydrogen bonds between -NH of amino acid in the one turn with -CO of amino acid to adjacent turn
(c) -OH group of one amino acid with -CO group of other amino acid on the turn
(d) Hydrogen bonds between adjacent amino acids

Answer

Answer: (b) Hydrogen bonds between -NH of amino acid in the one turn with -CO of amino acid to adjacent turn

---

Question 40.
Secondary structure of protein refers to
(a) sequence of amino acids in polypeptide chain
(b) bonds between alternate polypeptide chains
(c) folding patterns of polypeptide chain
(d) bonding between NH\(_{3}^{+}\) and COO^– of two peptides

Answer

Answer: (c) folding patterns of polypeptide chain

---

Question 41.
Which compound can exist in a dipolar (zwitter ion) structure?
(a) C₆H₅CH₂CH (N = CH₂) COOH
(b) (CH₃)₂CHCH (NH₂) COOH
(c) C₆H₅CONHCH₂COOH
(d) HOOCCH₂CH₂COCOOH

Answer

Answer: (b) (CH₃)₂CHCH (NH₂) COOH

---

Question 42.
Which of the following is an acidic amino acid?
(a) Glycine
(b) Valine
(c) Leucine
(d) Glutamic acid

Answer

Answer: (d) Glutamic acid

---

Question 43.
The melting points of amino acids are higher than the corresponding hal-acids because
(a) amino acids exist as zwitter ions resulting in strong dipole-dipole attraction
(b) amino acids are optically active
(c) due to higher molecular mass of-NH₂ group molecular mass of amino acids is higher
(d) they interact with water more than halo-acids and have salt like structure

Answer

Answer: (a) amino acids exist as zwitter ions resulting in strong dipole-dipole attraction

---

Question 44.
Most common types of secondary structures of proteins are
(a) a-helix and P-helix structures
(b) a-helix and P-pleated sheet structures
(c) right and left hand twisted structures
(d) globular and fibrous structures

Answer

Answer: (b) a-helix and P-pleated sheet structures

---

Question 45.
Mark the incorrect example
(a) Keratin and myosin-fibrous proteins
(b) Insulin and albumines-Globular proteins
(c) Glycylalanine-Djpeptide
(d) Enzymes and haemoglobin-Derived proteins

Answer

Answer: (d) Enzymes and haemoglobin-Derived proteins

---

We hope the given NCERT MCQ Questions for Class 12 Chemistry Chapter 14 Biomolecules with Answers Pdf free download will help you. If you have any queries regarding Biomolecules 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 9 Coordination Compounds with Answers Pdf free download. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. We have provided Coordination Compounds Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well.

Coordination Compounds Class 12 MCQs Questions with Answers

Coordination Compounds MCQ With Answers Pdf Question 1.
K₂[Fe(CN)₆] is a/an
(a) double salt
(b) complex salt
(c) acid
(d) base

Answer

Answer: (b) complex salt

---

Coordination Compounds Class 12 MCQ Question 2.
Which of the following compounds has tetrahedral geometry?
(a) [Ni(CN)₄]^2-
(b) [Pd(CN)₄]^2-
(c [PdCl₄]^2-
(d) [NiCl₄]^2-

Answer

Answer: (d) [NiCl₄]^2-

---

Coordination Is MCQ Class 12 Question 3.
The number of possible isomers for the complex
|Co(C₂O₄)₂ (NH₃)₂|
(a) 1
(b) 2
(c) 3
(d) 4

Answer

Answer: (b) 2

---

Coordination Compounds MCQ Question 4.
The oxidation state of nickel in |(Ni(CO₄)| is
(a) 1
(b) 4
(c) 2
(d) 3

Answer

Answer: (b) 4

---

MCQ On Coordination Compounds Question 5.
According to Werner’s theory of coordination compounds
(a) Primary valency is ion isable
(b) Secondary valency is ionisable
(c) Primary and secondary valencies are lonisable
(d) Neither primary nor secondary valency ¡s ionisable

Answer

Answer: (a) Primary valency is ion isable

---

MCQ Of Coordination Compounds Class 12 Question 6.
Ammonia acts as a very good ligand but ammonium ion does not form complexes because
(a) NH₃ isa gas while NH\(_{4}^{+}\) is in liquid form.
(b) NH₃ undergoes sp³ hybridisatiort while NH\(_{4}^{+}\) undergoes sp³ d hybndisation
(c) NH\(_{4}^{+}\) ion does not have any lone pair of electrons
(d) NH\(_{4}^{+}\) ion has one unpaired electron while NH₃ has two unpaired electrons

Answer

Answer: (c) NH\(_{4}^{+}\) ion does not have any lone pair of electrons

---

Coordination Compounds MCQ With Answers Question 7.
The ligand N(CH₂CH₂NH₂) is
(a) bidentate
(b) tridentate
(c) tetradentate
(d) pentadentate

Answer

Answer: (c) tetradentate

---

Coordination Chemistry MCQ Question 8.
Which of the following is a tridentate ligand?
(a) EDTA⁴⁺
(b) (COO)\(_{2}^{2-}\)
(c) dien
(d) NO\(_{2}^{-}\)

Answer

Answer: (c) dien

---

Coordination Chemistry MCQ Questions And Answers Pdf Question 9.
Among the following which arc ambidentate ligands?
(i) SCN^–
(ii) NO\(_{3}^{-}\)
(iii) NO\(_{2}^{-}\)
(iv) C₂O\(_{4}^{2-}\)
(a) (i) and (iii)
(b) (i) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)

Answer

Answer: (a) (i) and (iii)

---

MCQs On Coordination Compounds Question 10.
Which of the following ligands form a chelate?
(a) Acetate
(b) Oxalate
(c) Cyanide
(d) Ammonia

Answer

Answer: (b) Oxalate

---

Coordination Chemistry MCQ With Answers Question 11.
Which of the following is not a neutral ligand?
(a) H₂O
(b) NH₃
(c) ONO
(d) CO₂

Answer

Answer: (c) ONO

---

MCQ Questions On Coordination Compounds Question 12.
Which of the following ligands will not show chelation?
(a) EDTA
(b) DMG
(c) Ethene-1, 2-diamine
(d) SCN^–

Answer

Answer: (d) SCN^–

---

MCQ On Coordination Chemistry Question 13.
The complex ion which has no d-electrons in the central metal atom is
(a) [MnO₄]^–
(b) [Co(NH₃)₆]^3-
(c) [Fe(CN)₆]^3-
(d) [Cr(H₂O)₆]³⁺

Answer

Answer: (a) [MnO₄]^–

---

Coordination Compound MCQ Question 14.
The correct IUPAC name of the coordination compound K₃|Fe(CN)₅NO| is
(a) Potassium pentacyanonitrosylferrate (II)
(b) Potassium pentacyanonitroferrate (II)
(c) Potassium nitritopentacyanoferrate (IV)
(d) Potassium nitritepentacynanoiron (II)

Answer

Answer: (a) Potassium pentacyanonitrosylferrate (II)

---

Coordination Compounds MCQs Question 15.
The correct IUPAC name of the following compound is |Cr(NH₃)₅(NCS)||ZnCl₄|
(a) Penta amine isothiocyanato chromium (III) tetrachlorozincate (II)
(b) Penta amine isothicocyanatezinc chloridechromate (III)
(c) Penta amine isothicoyanato chromate (II)
(d) isothiocyanatopenta amine chromium (II) zinc chloride (IV)

Answer

Answer: (a) Penta amine isothiocyanato chromium (III) tetrachlorozincate (II)

---

Question 16.
Correct formulae of tetraaminechloronitroplatinum (IV) sulphate can be written as
(a) [Pt(NH₃)₄ (ONO) Cl]SO₄
(b) [Pt(NH₃)₄Cl₂NO₂]₂
(c) [Pt(NH₃)₄ (NO₂) Cl]SO₄
(d) [PtCl(ONO)NH₃(SO₄)]

Answer

Answer: (c) [Pt(NH₃)₄ (NO₂) Cl]SO₄

---

Question 17.
Which of the following isomers will give white precipitate with BaCl₂ solution?
(a) [CO(NH₃)₅SO₄]Br
(b) [CO(NH₃)₅Br]SO₄
(c) [CO(NH₃)₄(SO₄)₂]Br
(d) [CO(NH₃)₄(SO₄)]

Answer

Answer: (c) [CO(NH₃)₄(SO₄)₂]Br

---

Question 18.
|Pt(NH₃)₄| |CuCl₄| and |Cu(NH₃)₄||PtCl₄| are known as
(a) ionisation isomers.
(b) coordination isomers
(c) linkage isomers
(d) polymerisation isomers

Answer

Answer: (b) coordination isomers

---

Question 19.
The name of the linkage isomer of |C0(NH₃)₅NO₂|Cl₂ will be
(a) pentaammonotrocobalt (II) chloride
(b) pentaaminenitrochloridecobaltate (III)
(c) pentaamminenitritocobalt (III) chloride
(d) pentanitrosoamminechlorocobaltate(III)

Answer

Answer: (c) pentaamminenitritocobalt (III) chloride

---

Question 20.
Which of the following complex species is not expected to exhibit optical isomerism?
(a) [Co(en) (NH₃)₂Cl₂]⁺
(b) [Co(en)₃]³⁺
(c)[Co(en)₂Cl₂]
(d) [Co(NH₃)₃Cl₃]

Answer

Answer: (d) [Co(NH₃)₃Cl₃]

---

Question 21.
Which of the following compounds exhibits linkage isomerism?
(a) [Co(en)₃]Cl₃
(b) [Co(NH₃)₆] [Cr(en)₃]
(c) [Co(en)₂(NO₂)CI]Br
(d) [Co(NH₃)₅CI]Br₂

Answer

Answer: (c) [Co(en)₂(NO₂)CI]Br

---

Question 22.
Which of the following will not show geometrical isomerism?
(a) [Cr(NH₃)₄Cl₂]Cl
(b) [Co(en)₂Cl₂]Cl
(c) [(Co(NH₃)₅NO₂]Cl₂
(d) [Pt(NH₃)₂Cl₂]

Answer

Answer: (c) (Co(NH₃)₅NO₂]Cl₂

---

Question 23.
Which of the following shows maximum number of isomers?
(a) [Cr(NH₃)₄Cl₂]
(b) [Ni(en)NH₃]²⁺
(c) [Ni(C₂O₄] (en)₂]²⁺
(d) [Cr(SCN)₂(NH₃)₄]⁺

Answer

Answer: (d) [Cr(SCN)₂(NH₃)₄]⁺

---

Question 24.
For the square planar complex |M_abcd| where M is the central atom and a, b. c, d are monodentate ligands, the number of possible geometrical isomers are
(a) 1
(b) 2
(c) 3
(d) 4

Answer

Answer: (c) 3

---

Question 25.
The hybridisation involved in [Co(C₂O₄)₃]^3- is
(a) sp³d²
(b) sp³d³
(c) dsp³
(d) d²sp³

Answer

Answer: (d) d²sp³

---

We hope the given NCERT MCQ Questions for Class 12 Chemistry Chapter 9 Coordination Compounds with Answers Pdf free download will help you. If you have any queries regarding Coordination Compounds 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 8 The d-and f-Block 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 The d-and f-Block Elements Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well.

The d-and f-Block Elements Class 12 MCQs Questions with Answers

D And F Block Elements Class 12 MCQ Question 1.
Oxidation number of gold metal is
(a) +1
(b) 0
(c) -1
(d) all of these

Answer

Answer: (a) +1

---

MCQ On D And F Block Elements Question 2.
Shape of d-orbital is
(a) spherical
(b) dumb bell
(c) double dumb bell
(d) none of these

Answer

Answer: (c) double dumb bell

---

D And F Block Elements MCQ Question 3.
Electronic configuration of alkaline earth element is
(a) ns²
(b) ns¹
(c) np⁶
(d) ns⁰

Answer

Answer: (a) ns²

---

D And F Block Elements MCQ Pdf Question 4.
Lanthanoid contraction is due to increase in
(a) atomic number
(b) effective nuclear charge
(c) atomic radius
(d) valence electrons

Answer

Answer: (b) effective nuclear charge

---

D And F Block Elements MCQ Pdf Download Question 5.
Which one of the following is called green vitriol?
(a) FeSO₄ 7H₂O
(b) CuSO₄ 5H₂O
(c) CaSO₄ 2H₂O
(d) None of these

Answer

Answer: (a) FeSO₄ 7H₂O

---

D Block Elements MCQ Questions Question 6.
Which block of elements are known as transition elements?
(a) p-block
(b) s-block
(c) d-block
(d) f-block

Answer

Answer: (c) d-block

---

D-Block Elements MCQs With Answers Question 7.
Most abundant element in earth’s crust is
(a) Si
(b) Al
(c) Zn
(d) Fe

Answer

Answer: (a) Si

---

MCQ Of D And F Block Elements Question 8.
Which one of the following is diamagnetic ion?
(a) Co²⁺
(b) Ni²⁺
(c) Cu²⁺
(d) Zn²⁺

Answer

Answer: (d) Zn²⁺

---

MCQ On F Block Elements Question 9.
Which of the following is not an element of first transition series?
(a) Iron
(b) Chromium
(c) Magnesium
(d) Nickel

Answer

Answer: (c) Magnesium

---

MCQ On D Block Elements Question 10.
The correct order of E\(_{0}^{M^{2+}/M}\) values with negative sign for the four successive elements Cr, Mn, Fe and Co is
(a) Fe > Mn > Cr > Co
(b) Cr > Mn > Fe > Co
(c) Mn > Cr > Fe > Co
(d) Cr > Fe > Mn > Co

Answer

Answer: (c) Mn > Cr > Fe > Co

---

MCQs On D And F Block Elements Question 11.
The number of unpaired electrons in gaseous species of Mn³⁺, Cl³⁺ and V³⁺ respectively are and the most stable species is
(a) 4, 3 and 2; V³⁺
(b) 3, 3 and 2; Cr³⁺
(c) 4, 3 and 2; Cr³⁺
(d) 3, 3 and 3; Mn³⁺

Answer

Answer: (c) 4, 3 and 2; Cr³⁺

---

D Block MCQ Class 12 Question 12.
Fe³⁺ ion is more stable than Fe²⁺ ion because
(a) more the charge on the atom, more is its stability
(b) configuration of Fe²⁺ is 3d⁵ while Fe³⁺ is 3d⁵
(c) Fe²⁺ has a larger size than Fe³⁺
(d) Fe³⁺ ions are coloured hence more stable

Answer

Answer: (b) configuration of Fe²⁺ is 3d⁵ while Fe³⁺ is 3d⁵

---

D Block Elements MCQ Question 13.
Colour of transition metal ions are due to absorption of some wavelength. This results in
(a) d-s transition
(b) s-s transition
(c) s-t/transition
(d) d-d transition

Answer

Answer: (d) d-d transition

---

MCQs On D Block Elements Question 14.
Which group contains coloured ions out of the following?
1. Cu^–. 2. Ti^4- 3. Co²⁺ 4. Fe^2-
(a) 1, 2, 3, 4
(b) 3, 4
(c) 2, 3
(4) 1, 2

Answer

Answer: (b) 3, 4

---

D And F Block Elements MCQs With Answers Question 15.
The melting points of Cu, Ag and Au follow the order
(a) Cu > Ag > Au
(b) Cu >Au > Ag
(c) Au > Ag > Cu
(d) Ag > Au > Cu

Answer

Answer: (b) Cu >Au > Ag

---

Question 16.
In which of the following pairs of ions, the lower oxidation state in aqueous solution is more stable than the other?
(a) Ti⁺, Ti³⁺
(b)Cu⁺, Cu³⁺
(c) Cr²⁺, Cr³⁺
(d) V²⁺, VO²⁺ (V⁴)

Answer

Answer: (a) Ti⁺, Ti³⁺

---

Question 17.
Which of the following pairs of ions have the same electronic configuration?
(a) Cu²⁺, Cr²⁺
(b) Fe³⁺, Mn²⁺
(c) Co³⁺, Ni³⁺
(d) Sc³⁺, Cr³⁺

Answer

Answer: (b) Fe³⁺, Mn²⁺

---

Question 18.
The melting point of copper is higher than that of zinc because
(a) copper has a bcc structure
(b) the atomic volume of copper is higher
(c) the electrons of copper are involved in metallic bonding
(d) the s as well as d electrons of copper are involved in metallic bonding

Answer

Answer: (c) the electrons of copper are involved in metallic bonding

---

Question 19.
Zr and Hf have almost equal atomic and ionic radii because of
(a) diagonal relationship
(b) lartthanoid contraction
(c) actinoid contraction
(d) belonging to the same group

Answer

Answer: (b) lartthanoid contraction

---

Question 20.
Which of the following is not an amphoteric ion?
(a) Al³⁺
(b) Cr³⁺
(c) Fe³⁺
(d) Zn²⁺

Answer

Answer: (c) Fe³⁺

---

Question 21.
What happens when potassium iodide reacts with acidic solution of potassium dichromate?
(a) It liberates iodine
(b) Potassium sulphate is formed
(c) Chromium sulphate is formed
(d) All the above products are formed

Answer

Answer: (d) All the above products are formed

---

Question 22.
The number of moles of KMnO₄ that are needed to react completely with one mole of ferrous oxalate in acidic solution is
(a) 3/5
(b) 2/5
(c) 4/5
(d) 1

Answer

Answer: (a) 3/5

---

Question 23.
Acidified potassium dichromate reacts with potassium iodide and oxidises it to I₂. What is the oxidation state of chromium in the products of the reaction?
(a) +4
(b) +6
(c) +3
(d) +2

Answer

Answer: (c) +3

---

Question 24.
One mole of acidfied K₂Cr³⁺O on reaction with excess KI will liberate ………….. mole(s) of I₂.
(a) 6
(b) 1
(c) 7
(d) 2

Answer

Answer: (a) 6

---

Question 25.
In the diehromateanion (Cr₂O\(_{7}^{2-}\))
(a) all Cr – O bonds are equivalent
(b) 6 Cr – O bonds are equivalent
(c) 3 Cr – O bonds are equivalent
(d) no bonds in Cr₂O\(_{7}^{2-}\) are equivalent

Answer

Answer: (b) 6 Cr – O bonds are equivalent

---

We hope the given NCERT MCQ Questions for Class 12 Chemistry Chapter 8 The d-and f-Block Elements with Answers Pdf free download will help you. If you have any queries regarding The d-and f-Block Elements CBSE Class 12 Chemistry MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.