Physics · 2022
JEE Main · 24 June 2022, Shift 2 · Q56
A sample contains 10^-2 kg each of two substances A and B with half lives 4 s and 8 s respectively. The ratio of their atomic weights is 1: 2. The…
A sample contains $\displaystyle 10^{-2} \mathrm{~kg}$ each of two substances A and B with half lives $\displaystyle 4$ s and $\displaystyle 8$ s respectively. The ratio of their atomic weights is $\displaystyle 1$ : $\displaystyle 2$ . The ratio of the amounts of A and B after $\displaystyle 16$ s is $\displaystyle \frac{x}{100}$. The value of $\displaystyle x$ is \_\_\_\_.
Official answer
25
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JEE Main 2022 Physics question, with the answer from NTA’s final answer key. Where our answers come from.