Modern Physics 5 Question 21
24. Assume that the nuclear binding energy per nucleon $(B / A)$ versus mass number $(A)$ is as shown in the figure.
Use this plot to choose the correct choice(s) given below.
$(2008,4$ M)
(a) Fusion of two nuclei with mass numbers lying in the range of $1<A<50$ will release energy.
(b) Fusion of two nuclei with mass numbers lying in the range of $51<A<100$ will release energy.
(c) Fission of a nucleus lying in the mass range of $100<A<200$ will release energy when broken into two equal fragments.
(d) Fission of a nucleus lying in the mass range of $200<A<260$ will release energy when broken into two equal fragments.
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Answer:
Correct Answer: 24. (c, d)
Solution:
- In fusion, two or more lighter nuclei combine to make a comparatively heavier nucleus.
In fission, a heavy nucleus breaks into two or more comparatively lighter nuclei.
Further, energy will be released in a nuclear process if total binding energy increases.
$\therefore$ Correct options are (b) and (d).
