A) 0.693
B) 1
C) \[{{10}^{-4}}\]
D) 1.155
Correct Answer: D
Solution :
Half life \[T/2=\frac{T}{1.44}=\frac{100}{1.44}\sec \] \[=69.44\sec \] \[=\frac{69.44}{60}\simeq 1.155\min \]
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