Home JEE Main - Previous Year Papers JEE MAIN 2019 PAPER 13 Half -lives of two radioactive nuclei A and …
JEE Main - Previous Year Papers JEE MAIN 2019 PAPER 13 Single Correct MCQ
Published on: August 14, 2026

Half -lives of two radioactive nuclei A and B are 10 minutes and 20 minutes, respectively. If, initially a sample has equal number of nuclei, then after 60 minutes, the ratio of decayed numbers of nuclei and will be:

A
B

C
D

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The correct answer is:
A

Number of nuclei decayed

Number of nuclei decayed

Since,

Ratio of decayed numbers of nuclei

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