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In a first order reaction mathbf(A) rarr...

In a first order reaction `mathbf(A) rarr (B)` if `(k)` is rate con stant and initial concentration of the reactant A. is `0.5`. M then the.half life is

A

`(ln 2)(k)`

B

`(0.693)(0.5 (k)`

C

(operatorname(tog) 2)((k))

D

`(log 2)(k) sqrt(0.5)`

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A
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