Activation energy of any chemical reaction can be calculated if one knows the value of

rate constant at two different temperatures

rate constant at standard temperature

orientation of reactant molecules during collision

The correct options for the rate law that corresponds to an overall first order reaction are

Rate $$=\mathrm{k}[\mathrm{A}]^{-1 / 2}[\mathrm{~B}]^{3 / 2}$$

Rate $$=\mathrm{k}[\mathrm{A}]^0[\mathrm{~B}]^2$$

Rate $$=\mathrm{k}[\mathrm{A}][\mathrm{B}]$$

Rate $$=\mathrm{k}[\mathrm{A}]^{1 / 2}[\mathrm{~B}]^2$$

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : A reaction can have zero activation energy. Reason R : The minimum extra amount of energy absorbed by reactant molecules so that their energy becomes equal to threshold value, is called activation energy. In the light of the above statements, choose the correct answer from the options given below:

Both A and R are true but R is NOT the correct explanation of A.

Both A and R are true and R is the correct explanation of A.

For the chemical reaction N2(g) + 3H2(g) ⇌ 2NH3(g) the correct option is :

$$ - {{d\left[ {{N_2}} \right]} \over {dt}} = {1 \over 2}{{d\left[ {N{H_3}} \right]} \over {dt}}$$

$$ - {{d\left[ {{N_2}} \right]} \over {dt}} = 2{{d\left[ {N{H_3}} \right]} \over {dt}}$$

$$3{{d\left[ {{H_2}} \right]} \over {dt}} = 2{{d\left[ {N{H_3}} \right]} \over {dt}}$$

$$ - {1 \over 3}{{d\left[ {{H_2}} \right]} \over {dt}} = -{1 \over 2}{{d\left[ {N{H_3}} \right]} \over {dt}}$$

Chemical Kinetics — NEET Previous Year Questions

31 solved PYQs · 2016–2026 · Chemistry

Solved PYQs: 31
Years covered: 2016–2026
Avg / year: ~3
Subject: Chemistry

How many NEET questions come from Chemical Kinetics?

Chemical Kinetics has contributed 31 questions to National Eligibility cum Entrance Test (UG) papers between 2016 and 2026 — an average of about 3 questions a year. That count is measured from EByAi’s bank of 46,150 NEET questions, not estimated from a syllabus. Every one of the 31 questions carries a written, step-by-step solution, and each is tagged to Chemical Kinetics within Chemistry, so you can drill this chapter across every year at once instead of hunting through paper PDFs. Practising a chapter’s full PYQ history is the fastest way to learn the patterns examiners reuse.

Sample Chemical Kinetics questions from real NEET papers

These are 5 real questions from the bank — exactly as asked, with the answer one tap away. All 31 Chemical Kinetics questions (with full written solutions) are available in practice.

Question 1 · NEET 2024
Activation energy of any chemical reaction can be calculated if one knows the value of
1. (A) $rate constant at standard temperature$
2. (B) $probability of collision$
3. (C) $orientation of reactant molecules during collision$
4. (D) $rate constant at two different temperatures$
Show answerAnswer
$Answer: (D) rate constant at two different temperatures$
Question 2 · NEET 2023
The correct options for the rate law that corresponds to an overall first order reaction are
1. (A) $Rate = k [A]^{0} [B]^{2}$
2. (B) $Rate = k [A] [B]$
3. (C) $Rate = k [A]^{1/2} [B]^{2}$
4. (D) $Rate = k [A]^{- 1/2} [B]^{3/2}$
Show answerAnswer
$Answer: (D) Rate = k [A]^{- 1/2} [B]^{3/2}$
Question 3 · NEET 2023
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : A reaction can have zero activation energy.

Reason R : The minimum extra amount of energy absorbed by reactant molecules so that their energy becomes equal to threshold value, is called activation energy.

In the light of the above statements, choose the correct answer from the options given below:
1. (A) $Both A and R are true but R is NOT the correct explanation of A.$
2. (B) $A is true but R is false.$
3. (C) $A is false but R is true.$
4. (D) $Both A and R are true and R is the correct explanation of A.$
Show answerAnswer
$Answer: (C) A is false but R is true.$
Question 4 · NEET 2020
An increase in the concentration of the reactants of a reaction leads to change in:
1. (A) $heat of reaction$
2. (B) $threshold energy$
3. (C) $collision frequency$
4. (D) $activation energy$
Show answerAnswer
$Answer: (C) collision frequency$
Question 5 · NEET 2019
For the chemical reaction

N2(g) + 3H2(g) ⇌ 2NH3(g)

the correct option is :
1. (A) $- \frac{d [ N _{2} ]}{d t} = 2 \frac{d [ N H _{3} ]}{d t}$
2. (B) $- \frac{d [ N _{2} ]}{d t} = \frac{1}{2} \frac{d [ N H _{3} ]}{d t}$
3. (C) $3 \frac{d [ H _{2} ]}{d t} = 2 \frac{d [ N H _{3} ]}{d t}$
4. (D) $- \frac{1}{3} \frac{d [ H _{2} ]}{d t} = - \frac{1}{2} \frac{d [ N H _{3} ]}{d t}$
Show answerAnswer
$Answer: (B) - \frac{d [ N _{2} ]}{d t} = \frac{1}{2} \frac{d [ N H _{3} ]}{d t}$

Chemical Kinetics questions by year

Year	Questions	Share of chapter questions
2026	3
2025	2
2024	6
2023	4
2022	3
2021	2
2020	2
2019	2
2018	2
2017	2
2016	3

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FAQs

How many NEET questions have been asked from Chemical Kinetics?

EByAi's bank holds 31 real NEET questions from Chemical Kinetics, asked between 2016 and 2026 — about 3 per year on average. Every count is measured from actual papers, not estimated.

Is Chemical Kinetics important for NEET?

31 questions over 11 papers make Chemical Kinetics a steady-weightage chapter in NEET Chemistry. The year-wise table above shows exactly how often it appears.

Can I solve Chemical Kinetics PYQs online for free?

Yes. EByAi lets you solve NEET past-year questions in the browser with written solutions — free daily practice, no card needed.

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