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Question

The kinetic datas for the reaction : 2A+B22AB arre as given below:

[A] (molL1)[B2] (molL1)Rate(molL1min1)0.51.02.5×1031.01.05.0×1030.52.01×102

Hence the order of reaction with respect to A and B2 are respectively :

A
1 and 2
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B
2 and 1
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C
1 and 1
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D
2 and 2
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Solution

The correct option is D 1 and 2
When the concentration of B is kept constant and the concentration of A is doubled, the rate of the reaction is also doubled.
Hence, the reaction is first order in A.
When the concentration of A is kept constant and the concentration of B is doubled, the rate of the reaction becomes 4 times.
Hence, the reaction is second order in B.

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