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For a first-order reaction A rarr B the ...

For a first-order reaction `A rarr B` the reaction rate at reactant concentration of `0.01 M` is found to be `2.0 xx 10^(-5) "mol" L^(-1) s^(-1)`. The half-life period of the reaction is

A

300 s

B

30 s

C

220 s

D

347 s

Text Solution

Verified by Experts

The correct Answer is:
D
`r=k xx[A] rArr 2xx10^(-5) =k xx0.01 rArr k=2xx10^(-3)`
Half life, `t_(1//2) =(0.693)/(2xx10^(-2))=(693)/(2)" sec "~~ 347` sec.
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