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Half life period of a first order reacti...

Half life period of a first order reaction is 693 seconds. The specific rate constant of the reaction is

A

`2 xx 10^(-2) s ^(-1)`

B

`1 xx 10^(-3) s ^(-1)`

C

`2.5 xx 10^(-4) s ^(-1)`

D

`1 xx 10^(-4) s ^(-1)`

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