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t1/4 can be taken as time taken for the ...

`t_1/4` can be taken as time taken for the concentration of the reactant to drop to `3/4` of the initial value. If the rate constant for a first order reaction is k, the `t_ 1/4` can be written as :

A

`0.10 / k`

B

`0.29 / k`

C

`0.69 / k`

D

`0.75/ k`

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