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Physics · 2026 · 1 mark
CBSE 2026 · Region 5 · Set 3 · Q10
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…
Consider the nuclear reaction $\displaystyle \mathrm{X} \rightarrow \mathrm{Y}+\mathrm{Z}$. Let $\displaystyle \mathrm{M}_{\mathrm{x}}, \mathrm{M}_{\mathrm{y}}$ and $\displaystyle \mathrm{M}_{\mathrm{z}}$ be the masses of the three nuclei X, Y and Z respectively. Then which of the following relations hold true?
Official answer
(C)
$\displaystyle \mathrm{M}_{\mathrm{x}}>\left(\mathrm{M}_{\mathrm{y}}+\mathrm{M}_{\mathrm{z}}\right)$
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CBSE Class 12 Physics past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.