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Teachoo MCQ Test

CBSE Past Year MCQ Quiz

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Chapter 13 - Nuclei | 5 questions

Timed test. Answer every question before time runs out. Correct answers and solutions appear after submission.
Time remaining 480
Question 1 of 5
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Question 1 of 5
CBSE Past Year 2026

If \(r_1\) and \(r_2\) are the radii of atomic nuclei of mass numbers 64 and 27 respectively, then the value of \(\left(\frac{r_1}{r_2}\right)\) is:

Select one option. Answers are shown after the test.
Question 2 of 5
CBSE Past Year 2026

Consider the nuclear reaction X → Y + Z. Let \(M_{x}\), \(M_{y}\) and \(M_{z}\) be the masses of the three nuclei X, Y and Z respectively. Then which of the following relations hold true ?

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Question 3 of 5
CBSE Past Year 2026

Nuclides with the same number of neutrons are called :

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Question 4 of 5
CBSE Past Year 2026

Assertion (A) : Energy is released when heavy nuclei undergo fission or light nuclei undergo fusion.

Reason (R) : For heavy nuclei, binding energy per nucleon increases with increasing Z while for light nuclei, it decreases with increasing Z.

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Question 5 of 5
CBSE Past Year 2026

Reason (A) : The mass of a nucleus is less than the sum of the masses of the constituent nucleons.

Reason (R) : Energy is absorbed when the nucleons are bound together to form a nucleus.

Select one option. Answers are shown after the test.