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

75% of a first order reaction was completed in 32 min. When was 50% of the reaction completed ?

A

24 min

B

16 min

C

8 min

D

4 min

Text Solution

Verified by Experts

The correct Answer is:
B
`K = (2.303)/32 log a/(a/4)`
`K = (2.303)/32 xx 2 xx 0.301`
`t_(1/2) = (0.693)/(0.0433) = 16min`
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