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If 5g pf a radioactive substanc ehas t(1...

If `5g` pf a radioactive substanc ehas `t_(1//2) = 12hr, 20g` of the same substance will have a `t_(1//2)` equal to:

A

`56 hr`

B

`3.5hr`

C

`14hr`

D

`28hr`

Text Solution

Verified by Experts

The correct Answer is:
`(c)`
`t_(1//2) = (0.693)/(lambda)` and is independent if initial amount.
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P BAHADUR-RADIO ACTIVITY-Exercies 3A
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  2. The parent nucleus of (4n + 3) seires is:

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