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Standard VIII
Chemistry
Rate Constant
The following...
Question

The following data pertains to reaction between A and B :
S.NO.[A]mol L−1mol L−1Rate(mol L−1time−1)11.0×10−22.0×10−22.0×10422.0×10−22.0×10−24.0×10−432.0×10−24.0×10−28.0×10−4
Which of the following inference(s) can be drawn from the above data ?

1. Rate constant of the reaction is 1.0×10−4

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]=2.0×10−41×10−2×2×10−2=1(rate)2(rate)1=k(2[A])(2[b])k[A][B]


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Q.

The following data pertains to reaction between A and B :
S.NO.[A]mol L−1mol L−1Rate(mol L−1time−1)11.0×10−22.0×10−22.0×10422.0×10−22.0×10−24.0×10−432.0×10−24.0×10−28.0×10−4
Which of the following inference(s) can be drawn from the above data ?

1. Rate constant of the reaction is 1.0×10−4

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:


Q. The following data pertains to the reaction between A and B:
S. No[A][B]Rate
11×10−22×10−22×10−4
22×10−22×10−24×10−4
32×10−2 4×10−28×10−4

Which of the following inferences can be drawn from the above data?

1. Rate law of the reaction is K[A][B].
2. Rate constant of the reaction is 10−4.
3. Rate of reaction increases four times by doubling the concentration of each reactant.
Select the correct answer from the codes given below:

Q. The following data pertain to reaction between A and B.
S.No[A][B]Rate(mol.L−1)(mol.L−1)(mol.L−1sec−1)I1×10−22×10−22×10−4II2×10−22×10−24×10−4III2×10−24×10−28×10−4

Which of the following inference(s) can be drawn from the above data and select the correct answer codes.
(a) Rate constant of the reaction is 10−4.
(b) Rate law expression for the reaction is k[A][B].
(c) Rate of reaction increases four times on doubling the concentration of both the reactant.
Q. The following data pertain to the reaction between A and B:
S.No.[A]mol.L−1[B]mol.L−1Ratemol.L−1.t−1
I1×10−22×10−22×10−4
II2×10−22×10−24×10−4
III2×10−24×10−28×10−4
Which of the following inference(s) can be drawn from the above data
[a]rate constant of the reaction is 10−4
[b]rate law of the reaction is k[A][B]
[c]rate of reaction increases four times on doubling the concentration of both the reactants
Select the correct answer:
Q. The rate of a reaction increases four-fold when the concentration of reactant is increased 16 times. If the rate of reaction is 4×10−6 mol L−1 s−1 when the concentration of the reactant is 4×10−4 mol L−1. The rate constant of the reaction will be:
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