MCQ nuclei -1
Class 12 Physics Science

MCQ Questions Class 12 Nuclei With Answers

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CBSE Class 12 Nuclei Multiple Choice Questions with Answers. MCQ Questions Class 12 Nuclei with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Nuclei MCQs with Answers to know their preparation level.

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MCQ Questions Class 12 Nuclei with Answers - Set - 1

Question 1: 

Maximum permissible radiation dose a a person may have with no adverse effects is
(a) 250 × 10-1 roentgen’s per week.
(b) 250 × 10-2 roentgen’s per week.
(c) 250 × 10-3 roentgen’s per week.
(d) 250 roentgen’s per week.

Correct Answer – (C)

Question 2 : 

When the number of nucleons in nuclei increases, the binding energy per nucleon numerically
(a) increases continuously with mass number.
(b) decreases continuously with mass number.
(c) First increases and then decreases with increase of mass number.
(d) Remains constant with mass number.

Correct Answer – (C)

Question 3 : 

The binding energies of the atoms of elements A and B are Ea and Eb respectively. Three atoms of the elements B fuse to give one atom of element A. This fusion process is accompanied by release of energy E. Then Ea, Eb and E are related to each other as:
(a) Ea + E = 3 Eb
(b) Ea = 3Eb
(c) Ea – E = 3 Eb
(d) Ea + 3Eb + E = 0

Correct Answer – (A)

Question 4 : 

The binding energy per nucleon is almost constant for many nuclei. It shows that nuclear forces are
(a) Charge independent
(b) saturated in nature
(c) short range in nature
(d) attractive in nature

Correct Answer – (B)

Question 5 : 

How much energy will approximately be released if all the atoms of 1 kg of deuterium could undergo fusion?
(a) 2 × 107 kWh
(b) 9 × 1013J
(c) 6 × 1027 Cal
(d) 8 × 1023 MeV.

Correct Answer – (B)

MCQ Questions Class 12 Nuclei with Answers

Question 6 : 

For an atomic reactor being critical, the ratio (k) of the average number of neutrons produced and used in chain reaction
(a) depends upon the mass of the fissionable material.
(b) is greater than one.
(c) is less than one.
(d) is equal to one.

Correct Answer – (A)

Question 7 : 

One requires an energy En to remove a nucleon from a nucleus and an energy Ee to remove an electron from an atom. Then
(a) En = Ee
(b) En > Ee
(c) En < Ee
(d) En > Ee.

Correct Answer – (B)

Question 8 : 

The binding energies per nucleon for a deutron and an α- particle are x1 and x2 respectively. The energy Q released in reaction
1H² + 1H² → 42He + Q is
(a) 4 (x1 + x2)
(b) 4 (x1 – x2)
(c) 2 (x1 + x2)
(d) 2 (X1 – x2).

Correct Answer – (B)

Question 9 : 

The packing fraction for 147N isotope whose mass is 14.003 amu is:
(a) 0.9
(b) 7.8 × 10-3
(c) 1.0002
(d) 2.1 × 10-4

Correct Answer – (B)

Question 10 : 

Beta rays emitted by a radioactive material are
(a) neutral particles.
(b) charged particles emitted by nucleus.
(c) electromagnetic radiations.
(d) electrons orbiting around the nucleus.

Correct Answer – (B)
MCQ Questions Class 12 Nuclei with Answers
Set 1
Set 2
Set 3
Set 4
Set 5

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