Physics · 2022
JEE Main · 28 July 2022, Shift 1 · Q48
The half life period of a radioactive substance is 60 days. The time taken for 7/8 th of its original mass to disintegrate will be:
The half life period of a radioactive substance is $\displaystyle 60$ days. The time taken for $\displaystyle \frac{7}{8}$ th of its original mass to disintegrate will be :
Official answer
(3)
$\displaystyle 180$ days
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JEE Main 2022 Physics question, with the answer from NTA’s final answer key. Where our answers come from.