After 2 hours the amount of a certain radioactive substance reduces to `1//16^(th)` of the original amount (the decay process follows first-order kinetics). The half-life of the radioactive substance is
A. 15 min
B. 30 min
C. 45 min
D. 60 min

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1 Answers

Correct Answer - B
`(0.693)/(t_(1//2))=(2.303)/(2xx60)log. (a)/(a//16)`
`t_(1//2)=30 min`

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