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Question

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


[A]molL1[B2]molL1Rate mol L1min1
0.51.02.5×103
1.01.05.0×103
0.52.01×102

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 B 1 and 2
2.5×103=k[0.5]a[1.0]β.....(1)
5×103=k[1.0]a[1.0]β......(2)
1×102=k[0.5]a[2.0]β....(3)
Dividing equation (1) and (2),
12=[12]a
Hence a=1.
Dividing equation (1) and (3),
2.5×1031×102=(1.02.0)β
14=(12)β

β=2.

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