A radioactive sample at any instant has its disintegration rate 5000 d – McqOptions

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1.	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 [AIEEE 2003]
A.	0.8 In 2
B.	0.4 In 2
C.	0.2 In 2
D.	0.1 In 2
Answer» C. 0.2 In 2

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