In a first order reaction, the concentra...

In a first order reaction, the concentration of the reactant is decreased from 1.0 M to 0.25 M in 20 minute. The rate constant of the reaction would be:

A

`10 "min"^(-1)`

B

`6.931 "min"^(-1)`

C

`0.693 "min"^(-1)`

D

`0.06931 "min"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:

D

`k = 2.303/t log A_(0)/A_(1)`
`= 2.303/20 log 1/0.25`
`= 0.0693 "min"^(-1)`

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