The ratio of molecular mass of two radioactive substances is ${\rm{3/2}}$ and the ratio of their decay constants is ${\rm{4/3}}$. Then, the ratio of their initial activity per mole will be

JEE PHYSICS MCQ: NUCLEI

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The ratio of molecular mass of two radioactive substances is

\mathrm{3/2}

and the ratio of their decay constants is

\mathrm{4/3}

. Then, the ratio of their initial activity per mole will be

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Correct option: B

4/3

Option B (4/3) is correct because the ratio of initial activities is equal to the ratio of their decay constants, as the number of nuclei per mole is the same for both substances.

JEE PHYSICS MCQ: NUCLEI

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