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Standard VIII
Chemistry
Rate of Reaction
The following...
Question

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.

A
a, b and c
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B
a and b
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C
b and c
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D
c alone
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Solution

The correct option is C b and c
Let, the rate of reaction be r=k[A]a[B]b
r1=k[10−2]a[2×10−2]b=2×10−4...(1)
r2=k[2×10−2]a[2×10−2]b=4×10−4...(2)
r3=k[2×10−2]a[4×10−2]b=8×10−4...(3)
Dividing equation (2) by (1), we get
2a=2
⇒a=1
Again dividing the equation (3) by (2), we get
2b=2
⇒b=1
Rate law expression is r=k[A][B]
We have
r1=k[10−2][2×10−2]=2×10−4
⇒k=1
Comparing equation (1) and (3), we came to know that the rate increases by four times when concentration of both the reactants are doubled.

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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 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 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. Following data are obtained for the reaction: A+B→product

[A](moleL−1)[B](moleL−1)Rate(moleL−1s−1)

4×10−24×10−22×10−2
4×10−28×10−24×10−2
2×10−28×10−22×10−2

The reaction confirms the rate law:

Q.
Sr.No.[A]0/M(lonic conc.)[B]0/M(lonic conc.) rate/(Msec−1)
1 1.6×10−3 5×10−2 10−3
2 3.2×10−3 5×10−2 4×10−3
3 1.6×10−3 10−1 2×10−3
4 3.2×10−310−1 8×10−3
For the reaction A+B⟶C; starting with different initial concentration of A and B, initial rate of reaction were determined graphically in four experiments :
Rate law for reaction from above data is :
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