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A sample contains 10^(-2) kg of two subs...

A sample contains `10^(-2)` kg of two substances A and B with half lives of 4 and 8 sec repsectively (Given that atomic mass of B is twice of A ).
The ratio of average life of A and B is :

A

`1 : 2`

B

`2 : 1`

C

`1 : 4`

D

`4 :1`

Text Solution

Verified by Experts

The correct Answer is:
A
`T_(A) = (1)/(lamda_(A)) = (4)/(0.693), T_(B) = (1)/(lambda_(B)) = (8)/(0.693) therefore (T_(A))/(T_(B)) = (1)/(2)`
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