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Equation for the half life period in fir...

Equation for the half life period in first order reaction is :

A

`t_1/2=0.602/k`

B

`t_1/2=0.693/K`

C

`t_1/2=K/0.693`

D

`t_1/2=K/0.602`

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The correct Answer is:
B
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