Q49 / 66 · JEE Advanced 2007 (Paper 1) · Physics

In the options given below, let $E$ denote the rest mass energy of a nucleus and $n$ a neutron. The correct option is

  • Correct answer
    A
    $E\left({ }_{92}^{236} \mathrm{U}\right)>E\left({ }_{53}^{137} \mathrm{I}\right)+E\left({ }_{36}^{97} Y\right)+2 E(n)$
  • B
    $\left.E{ }_{92}^{236} \mathrm{U}\right) < E\left({ }_{53}^{137} \mathrm{I}\right)+E\left({ }_{39}^{97} Y\right)+2 E(n)$
  • C
    $E\left({ }_{92}^{236} \mathrm{U}\right) < E\left(5_{56}^{140} \mathrm{Ba}\right)+E\left({ }_{36}^{94} \mathrm{Kr}\right)+2 E(n)$
  • D
    $E\left(9_{92}^{236} \mathrm{U}\right) < E\left(5_{56}^{140} \mathrm{Ba}\right)+E\left({ }_{36}^{94} \mathrm{Kr}\right)+2 E(n)$

Solution

Rest mass of parent nucleus should be greater than the rest mass of daughter nuclei. Therefore, option (a) will be correct.

Hence, the correct answer is option: 'A'.

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