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2HIoverset("Au")(to)H(2)+I(2) following ...

`2HIoverset("Au")(to)H_(2)+I_(2)` following `n^(th)` order kinetics. If rate of the reaction is given by rate `=-(1)/(2)(d[HI])/(dt)` and concentration of HI drops from `1.5`M to `0.3`M in `7.3` sec, value K is

A

`8xx10^(-2)"M -s"^(-1)`

B

`8xx10^(-2)M^(-1)-s^(-1)`

C

`8xx10^(-2)M^(-2)-s^(-1)`

D

`8xx10^(-2)s^(-1)`

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The correct Answer is:
A
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