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For the non-equilibrium process, A + Bra...

For the non-equilibrium process, `A + Brarr` products, the rate is first order with respect to A and second order with respect to B. If 1.0 mol each of A and B are introduced into a 1 litre vessel,and the initial rate were `1.0xx10^-2` mol/litre sec.The rate (in mol `litre^-1 sec^-1`) when half of the reactants have been used:

A

`1.2xx10^-3`

B

`1.2xx10^-2`

C

`1.2xx10^-4`

D

None of the above

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The correct Answer is:
A
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