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Question

The following data pertains to reaction between A and B :
S.NO.[A]mol L1mol L1Rate(mol L1time1)11.0×1022.0×1022.0×10422.0×1022.0×1024.0×10432.0×1024.0×1028.0×104
Which of the following inference(s) can be drawn from the above data ?

1. Rate constant of the reaction is 1.0×104

2. Rate law of the reaction is: rate =k[A][B]

3. Rate of reaction increases four times on doubting the concentration of both the reactants.

Select the correct answer using the codes given below:


A

1, 2 and 3

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B

1 and 2

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C

2 and 3

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D

3 only

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Solution

The correct option is C

2 and 3


Rate law : d[A]dt=k[A]x[B]y
Doubling [A], rate is doubled. Hence 2x=2,x=1
Similarly y=1;d[A]dt=k[A][B]
k=rate[A][B]=2.0×1041×102×2×102=1(rate)2(rate)1=k(2[A])(2[b])k[A][B]


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