Chemical Kinetics MCQ | Questions – Paper 1 2

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Topic: Chemical Kinetics, Test No.: 01, Total MCQs: 15

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Question 1

In a reaction, A + B → Product, rate is doubled when the concentration of B is doubled, and rate increases by a factor of 8 when the concentrations of both the reactants (A and B) are doubled, rate law for the reaction can be written as [CBSE AIPMT 2012]

A

Rate = k[A] [B]

B

Rate = k[A]2[B]

C

Rate = k[A][B]2

D

Rate = k[A]2[B]2

Question 2

In a zero-order reaction for every 10° rise of temperature, the rate is doubled. If the temperature is increased from 10°C to 100°C, the rate of the reaction will become [CBSE AIPMT 2012]

A
64 times
B
128 times
C
256 times
D
512 times
Question 3

For a first order reaction (A) → products the concentration of A changes from 0.1M to 0.025 M in 40minutes.

The rate of reaction when the concentration of A is 0.01 M is: [AIEEE 2012]

A

1.73 × 10–5 M/min

B

3.47 × 10–4 M/min

C

3.47 × 10–5 M/min

D

1.73 × 10–4 M/min

Question 4

The activation energy of a reaction at a given temperature is found to be 2.303 RT J mol–1. The ratio of rate constant to the Arrhenius factor is [Karnataka CET 2011]

A
0.1
B
0.01
C
0.001
D
0.02
Question 5

The following data were obtained during the first order decomposition of 2A(g) → B(g) + C(s) at a constant volume and at a particular temperature.

Sr. No.

Time

Total pressure in Pascal

1.

At the end of 10 min

300

2.

After completion

200

The rate constant in min–1 is [Karnataka CET 2011]

A

69.3

B

0.0693

C

6.93 × 10–4

D

6.93

Question 6

The time required for 100% completion of a zero order reaction is  [Karnataka CET 2011]

A

B

ak

C

D

Question 7

The rate of a chemical reaction doubles for every 10°C rise of temperature. If the temperature is raised by 50°C, the rate of the reaction increases by about [AIEEE 2011]

A
64 times
B
10 times
C
24 times
D
32 times
Question 8

In the hydrolysis of an organic chloride in presence of large excess of water, RCl + H2O → ROH + HCl

[West Bengal JEE 2010]

A
Molecularity and order of reaction both are 2
B
Molecularity is 2 but order of reaction is 1
C
Molecularity is 1 but order of reaction is 2
D
Moecularity is 1 and order of reaction is also 1
Question 9

Radioactivity of a sample (z = 22) decreases 90% after 10 years. What will be the half-life of the sample? [West Bengal JEE 2010]

A
5 years
B
2 years
C
3 years
D
10 years
Question 10

The activation energy for a reaction at the temperature T K was found to be 2.303 RT J mol–1. The ratio of the rate constant to Arrhenius factor is ______. [Karnataka CET 2010]

A

10–1

B

10–2

C

2 × 10–3

D

2 × 10–2

Question 11

Time required for 100 percent completion of a zero order reaction is [Karnataka CET 2010]

A
2k/a
B
a/2k
C
a/k
D
ak
Question 12

The concentration of R in the reaction R → P was measured as a function of time and the following data is obtained

[R] (molar)

1.0

0.75

0.40

0.10

t (min)

0.0

0.05

0.12

0.18

The order of the reaction is [IIT JEE 2010]

A
first
B
second
C
third
D
zero
Question 13

Which of these changes with time for a first-order reaction? [Delhi PMT 2010]

A. Rate of reaction

B. Rate constant

C. Half-life

A
A only
B
C only
C
A and B only
D
B and C only
Question 14

During the kinetic study of the reaction, 2A + B → C + D, following results were obtained:

Run

[A]/mol L–1

[B]/mol L–1

Initial rate of formation of D/mol L–1 min–1

I

0.1

0.1

6.0 × 10–3

II

0.3

0.2

7.2 × 10–2

III

0.3

0.4

2.88 × 10–1

IV

0.4

0.1

2.40 × 10–2

Based on the above data which one of the following is correct? [CBSE AIPMT 2010]

A

rate = k[A]2 [B]2

B

rate = k[A] [B]2

C

rate = k[A]2 [B]

D

rate = k[A] [B]

Question 15

For the reaction N2O5(g) → 2NO2(g) +  O2(g) the value of rate of disappearance of N2O5 is given as 6.25 × 10–3 mol L–1 s–1. The rate of formation of NO2 and O2 is given respectively as: [CBSE AIPMT 2010]

A

6.25 × 10–3 mol L–1 s–1 and 3.125 × 10–3 mol L–1 s–1

B

6.25 × 10–3 mol L–1 s–1 and 6.25 × 10–3 mol L–1 s–1

C

6.25 × 10–3 mol L–1 s–1 and 6.25 × 10–3 mol L–1 s–1

D

1.25 × 10–2 mol L–1 s–1 and 3.125 × 10–3 mol L–1 s–1

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2 thoughts on “Chemical Kinetics MCQ | Questions – Paper 1”

  • Reply ↓
    hafiz muhammed abdul rahman

    please show the solutions of the answer