Physics · 2011
NEET 2011 · Prelims · Code A · Q43
The half life of a radioactive isotope 'X' is 50 years. It decays to another element 'Y' which is stable. The two elements 'X' and 'Y' were found to…
The half life of a radioactive isotope 'X' is $\displaystyle 50$ years. It decays to another element 'Y' which is stable. The two elements 'X' and 'Y' were found to be in the ratio of $\displaystyle 1$ : $\displaystyle 15$ in a sample of a given rock. The age of the rock was estimated to be :
Official answer
(3)
$\displaystyle 200$ years
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NEET (UG) 2011 Physics question, with the answer from NTA’s final answer key. Where our answers come from.