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Half life period of a first order reacti...

Half life period of a first order reaction is 1386 seconds. The specific rate constant of the reaction is :

A

`0.5xx10^-2 s^-1`

B

`0.5xx10^-3 s^-1`

C

`5.0 xx10^-2 s^-1`

D

`5.0 xx10^-3 s^-1`

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