A radioactive sample at any instant has its disintegration rate 5… - Vidyadip

Question

A radioactive sample at any instant has its disintegration rate 5000 disintegration per minute. After 5 minutes, the rate is 1250 disintegrations per minute. Then, the decay constant (per minute) is(a) 0.8 In 2(b) 0.4 In 2(c) 0.2 In 2(d) 0.1 In 2

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Answer

(b) 0.4 In 2

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