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75% of a first-order reaction was comple...

`75%` of a first-order reaction was completed in `32` minutes, when was `50%` of the reaction completed ?

A

24 minutes

B

16 minutes

C

8minutes

D

4 minutes

Text Solution

Verified by Experts

The correct Answer is:
B
`N = (25)/(100) N_(0)` (at t = 32 minutes)
Thus, `t = (2.303)/(0.693) xx t_(1//2) "log"(N_(0))/(N)`
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