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In a certain reaction it takes 5 min for...

In a certain reaction it takes 5 min for the initial concentration of 0.5 M to become 0.25 M and another 5 min to become 0.125 M. The rate constant of the reaction is

A

0.138 `min^(-1)`

B

5 `min^(-1)`

C

0.2 `min^(-1)`

D

0.145 `min^(-1)`

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The correct Answer is:
A
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