A) 4
B) 5
C) 40
D) 1
Correct Answer: B
Solution :
Safe activity is \[<\frac{{{R}_{0}}}{18}\]As\[\frac{{{R}_{0}}}{32}<\frac{{{R}_{0}}}{18}<\frac{{{R}_{0}}}{16}\] So, number of half-lives in which sample becomes safe is 5.You need to login to perform this action.
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