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What are the units of the rate constant ...

What are the units of the rate constant of a reaction in which the half life is doubled by halving the initial concentration of reactants.

A

`M-s^(-1)`

B

`M^(-1)S^(-1)`

C

`"sec"^(-1)`

D

`M^(-2)s^(-1)`

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The correct Answer is:
B
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