Back to CHEMICAL KINETICS

Your Progress

0 / 103 Answered

Correct

Incorrect

Accuracy

JEE • CHEMISTRY • CHEMICAL KINETICS

Chemical kinetics practice · Easy

Choose an answer to check it, or open “View answer” to study the explanation. Sign in to save progress to your account.

Practice format and chapter quiz

These sets use single-correct-answer MCQs. They do not cover every JEE Main or JEE Advanced question format and are not full-length mock papers.

Take a chapter quiz →

Showing 91-103 of 103 questions

Preparing practice and saved progress…

91 Easy

91 of 103

Understanding +4 | -1

Activation energy of a chemical reaction can be determined by

View answer and explanation

Correct option: B

Determining the rate constant at two temperatures

Option B (Determining the rate constant at two temperatures) is correct because the Arrhenius equation relates activation energy to the rate constant at different temperatures.

92 Easy

92 of 103

Analyzing +4 | -1

With the help of following reactions, arrange metals A, B, D and E in decreasing order of their reactivity ?

(a)

B +{ANO}_3 \rightarrow {BNO}_3+ A

(b)

A +{HCl} \rightarrow {ACl}+\frac{1}{2} {H}_2

(c)

D +{ECl} \rightarrow {DCl}+ E

(d)

D +{HNO}_3 \rightarrow

No reaction

View answer and explanation

Correct option: B

>

>

>

Option B (B > A > D > E) is correct because it correctly orders the metals based on their reactivity as determined by the given reactions.

93 Easy

93 of 103

Application +4 | -1

In a reaction

A + B \to C

, the rate expression is

R = k\left[ A \right]{\left[ B \right]^2}

If the concentration of both the reaction is doubled at constant volume then the rate of the reaction will be

View answer and explanation

Correct option: A

Eight time

Option A (Eight time) is correct because the rate is proportional to [A][B]², so doubling both concentrations increases the rate by a factor of 2 * 2² = 8.

94 Easy

94 of 103

Understanding +4 | -1

Which of the following statements is not correct?

View answer and explanation

Correct option: C

Catalyst lowers the energy of activation of the forward direction without affecting the energy of activation of the backward direction

Option C (Catalyst lowers the energy of activation of the forward direction without affecting the energy of activation of the backward direction) is correct because a catalyst lowers the activation energy for both forward and reverse reactions equally.

95 Easy

95 of 103

Application +4 | -1

The rate constant of a first order reaction is

3 \times {10^{ - 6}}

per second and initial concentration is

0.10\;\mathrm{ }M.

Then the initial rate of reaction is

View answer and explanation

Correct option: C

3 \times {10^{ - 7}}\;m{s^{ - 1}}

The correct answer is C (

3 \times {10^{ - 7}}\;m{s^{ - 1}}

) because it correctly applies the rate law for a first-order reaction.

96 Easy

96 of 103

Analyzing +4 | -1

The rate equation for the reaction

2A + B \to C

is found to be

Rate = k\left[ A \right]\left[ B \right]

The correct statement in relation to this reaction that the

View answer and explanation

Correct option: C

Rate of formation of

C

is twice the rate of disappearance of

A

The correct answer is D because the rate of formation of C is half the rate of disappearance of A, as indicated by the stoichiometry of the reaction.

97 Easy

97 of 103

Analyzing +4 | -1

Which of the following statement is not correct for the reaction:

4A + B \to 2C + 2D

View answer and explanation

Correct option: A

The rate of disappearance of ‘B’ is twice the rate of appearance of ‘C’

Option A is the incorrect statement because the rate of disappearance of B is one-half the rate of appearance of C, not twice.

98 Easy

98 of 103

Application +4 | -1

How much faster would a reaction proceed at

25^\circ C

than at

0^\circ C

if the activation energy is

65\;kJ?

View answer and explanation

Correct option: C

11 times

The correct answer is C (11 times) because the reaction proceeds approximately 11 times faster at 25°C than at 0°C, based on the Arrhenius equation and the given activation energy.

99 Easy

99 of 103

Analyzing +4 | -1

For the reaction system

2\mathrm{NO}\left( \mathrm{g} \right) + {\mathrm{O}_2}\left( \mathrm{g} \right) \to 2\mathrm{N}{\mathrm{O}_2}\left( \mathrm{g} \right)

if the volume of the reaction vessel is reduced to one-third of its original volume, what will be the order of the reaction?

View answer and explanation

Correct option: C

Increase to twenty seven times of its initial value

Option C (

0.01 \mathrm{~M}\left(\mathrm{NH}_4\right)_3 \mathrm{PO}_4

) is correct because it produces the highest concentration of

NH_4^+

ions, leading to the lowest pH (most acidic) among the given options, and the question is asking for the maximum pH, so the least acidic has the highest pH.

100 Easy

100 of 103

Application +4 | -1

DDT on exposure to water decomposes. Half-life is 10 yr. How much time it will take for its decomposition to 99%?

View answer and explanation

Correct option: B

70 Yr

Option B (70 Yr) is correct because it is the approximate time calculated using the first-order kinetics equation for 99% decomposition.

101 Easy

101 of 103

Remembering +4 | -1

The minimum energy required for the reacting molecules to undergo reaction is :

View answer and explanation

Correct option: D

Activation energy

Option D (Activation energy) is correct because activation energy is the minimum energy required for a chemical reaction to occur.

102 Easy

102 of 103

Application +4 | -1

In the reaction

BrO_3^ - \left( {aq} \right) + 5\,B{r^ - }\left( {aq} \right) + 6{H^ + }\left( {aq} \right) \to 3B{r_2}\left( l \right) + 3{H_2}O\left( l \right)

The rate of appearance of bromine

\left( {B{r_2}} \right)

is related to rate of disappearance of Bromide ions is

View answer and explanation

Correct option: D

\frac{{d\left[ {B{r_2}} \right]}}{{dt}} = \frac{3}{5}\,\,\frac{{d\left[ {B{r^ - }} \right]}}{{dt}}

Option D (

\frac{{d[B{r_2}]}}{{dt}} = \frac{3}{5}\frac{{d[B{r^ - }]}}{{dt}}

) is correct because it correctly relates the rate of appearance of bromine to the rate of disappearance of bromide ions based on the stoichiometric coefficients.

103 Easy

103 of 103

Remembering +4 | -1

With increase in temperature, rate of reaction

View answer and explanation

Correct option: A

increases

Option A (increases) is correct because reaction rate generally increases with temperature due to increased molecular kinetic energy and collisions.

Revision notes and key takeaways

Review CHEMICAL KINETICS in your textbook or class notes, then use this set to check your understanding.

Showing 91-103 of 103 questions

Your Progress

Chemical kinetics practice · Easy

Continue Your Practice

Your practice