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Half change time for a 1st order reactio...

Half change time for a 1st order reaction is 20 minutes, hence the rate constant for the reaction is

A

0.346 (min)^(-1)

B

0.0346 (min)^(-1)

C

3.46 (min)^(-1)

D

0.693 (min)^(-1)

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The correct Answer is:
B
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