If 3//4 quantity of a radioactive elemen...

If `3//4` quantity of a radioactive element disintegrates in two hours, its half life would be

A

1 hour

B

45 min

C

30 min

D

15 min

Verified by Experts

The correct Answer is:

A

`N = (25)/(100) N_0 ` (at t = 2 hr)
Thus `t = (2.303)/(0.693) xx t_(1//2) log (N_0)/(N)`

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