CBSE 2022 · Region 2 · Set 1 · Q9 · 3 marks
(a)Depict the variation of the potential energy of a pair of nucleons with the separation between them.(b)Imagine the fission of a $\displaystyle { }_{26}^{56} \mathrm{Fe}$ into two equal fragments of $\displaystyle { }_{13}^{28} \mathrm{Al}$ nucleus. Is the fission energetically possible ? Justify your answer by working out Q value of the process. Given : $\displaystyle \mathrm{m}\left({ }_{26}^{56} \mathrm{Fe}\right)=55 \cdot 93494 \mathrm{u}, \mathrm{m}\left({ }_{13}^{28} \mathrm{Al}\right)=27 \cdot 98191 \mathrm{u}$.
(a)
Depict the variation of the potential energy of a pair of nucleons with the separation between them.
(b)
Imagine the fission of a $\displaystyle { }_{26}^{56} \mathrm{Fe}$ into two equal fragments of $\displaystyle { }_{13}^{28} \mathrm{Al}$ nucleus. Is the fission energetically possible ? Justify your answer by working out Q value of the process. Given : $\displaystyle \mathrm{m}\left({ }_{26}^{56} \mathrm{Fe}\right)=55 \cdot 93494 \mathrm{u}, \mathrm{m}\left({ }_{13}^{28} \mathrm{Al}\right)=27 \cdot 98191 \mathrm{u}$.
Marking-scheme solution
(a)
(b)
Mass Difference $\displaystyle = 55.93494 - 2 \times 27.98191$
$\displaystyle = -0.02442\ \mathrm{u}$
Fission not possible.
NucleiMass-Energy and Nuclear Binding EnergyApplyshort_answerhard
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CBSE Class 12 Physics past-paper question from the 2022board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.