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Question

The experimental data for the reaction
2A+B22AB is as follows


[A][B2]Rate
0.50M0.50M1.6×104s1
0.50M1.00M3.2×104s1
1.00M1.00M3.2×104s1

The most probable equation for the rate of the reaction is :

A
k[B2][A]2
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B
k[B2]
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C
k[A]2
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D
k[A][B]
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Solution

The correct option is B k[B2]
When the concentration of B2 is doubled, the rate is doubled so the order with respect to B2 is one.

When the concentration of A is doubled, the rate remains unaltered so the order with respect to A is 0.

So, dxdt=k[A]o[B2]1=k[B2]

Option B is correct.

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