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The half life of .92U^(238) against alph...

The half life of `._92U^(238)` against `alpha` -decay is `4.5xx10^9` years. What is the activity of 1g sample of `._92U^(238)`?

A

`1.23xx10^(4) Bq`

B

`2.4xx10^(5) Bq`

C

`1.82xx10^(6) Bq`

D

`4.02xx10^(8) Bq`

Text Solution

Verified by Experts

The correct Answer is:
A
Activity or rate of decay is `R= lambda N` where `lambda=(0.693)/(T_(1//2))` and `N=` No. of atom is `1 gm` of `._(92)^(238)U=(1xx6.025xx10^(23))/(238)=25.3xx10^(10)` atoms , `R= lambda N`
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