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60% of a first order reaction was comple...

`60%` of a first order reaction was completed in `60 min`. The time taken for reactants to decompose to half of their original amount will be

A

`45` min

B

`60` min

C

`40` min

D

`50` min

Text Solution

Verified by Experts

The correct Answer is:
A
`60 = (2.303)/(K) "log" (100)/(40)`
`t = (2.303)/(K)"log"(100)/(50)`
`:. (60)/(t) = (0.40)/(0.310)`
`:. t = 45` minutes
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