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The half-life period of a first order re...

The half-life period of a first order reaction is 10 minutes. Starting with initial concentration 12 M, the rate after 20 minutes is

A

`0.0693 M min ^(-1)`

B

`0.693 xx3 M min ^(-1)`

C

`0.0693 xx 3 M min ^(-1)`

D

`0.0693 xx4 M min ^(-1)`

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The correct Answer is:
C
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