NEET UG · Chemistry · Class 12

Chemical Kinetics: NEET previous year questions

21 questions in ten years of NEET, asked in 10 of 10 years. Here is what this chapter tests and how.

Asked in 10 years: 21; 10 of 10 papers
10-year average: 2.0; a paper · 2.2 since 2024 +0.3
Typical range: 2; questions a paper; fewest 2, most 3
Weighted estimate: 2.2; model, recent papers count more · about 9 marks

Typical range (fact)
10-year average (fact)
Weighted estimate (model)

Typical range: questions per paper in the middle eight of the ten papers, leaving out the single highest and lowest year (about the 10th to 90th percentile), each paper scaled to 180 questions. The ten-year average and the range are historical fact. The weighted estimate is a model: each paper's share, with recent papers counting more (half-life three years), and dropped syllabus removed. It is a guide to effort, not a forecast.

What to do

How to spend time on Chemical Kinetics

Priority

Should do

Among the chapters that took NEET from half to 80% of its questions. How bands are set

Past questions: 21in 10 of 10 papers
Study plan gives it: 14 hover 12 months; 10 h over 6

Study this chapter →Practise →

Ideas asked most often

First Order Integrated Rate Law4×
Arrhenius Plot Interpretation3×
Arrhenius Equation at Two Temperatures2×
General Half-Life Formula2×

45 of the 65 ideas in Lumi’s map of this chapter have not been asked or touched in ten years. New questions often come from ideas like these, so learn the whole chapter, not just the list above.

Questions per year

Kind of question

SHARE OF 10 YEARS

Calculation52%
Concept19%
Figure-based19%
Recall5%
Assertion–reason5%

Most common asks: numerical (11); compare first and second order reactions (1); effect of concentration on half-life (1).

Profile

This chapter in numbers

Where it ranks, how steady it is, and what it costs to study.

Rank, all NEET chapters: #34; of 80 by weighted estimate
Rank in Chemistry: #9; of 21 chapters
Share of the paper: 1.1%; ten-year average
Busiest year: 2024; 3 questions
Year to year: Steady; varies by about 0.3 questions
Long-run direction: +0.02; questions per paper, per year
Easy questions: 62%; 28% of ideas rated hard
With a figure: 19%; graph, diagram or structure
Study time: 14 h; 10 h on a 6-month plan
Marks per study hour: 0.66; #15 of 80 chapters
Foundation for others: 22%; of its ideas are used in other chapters

Difficulty, year by year

Each question rated easy, medium or hard against NCERT.

20172
20182
20192
20202
20212
20222
20232
20243
20252
20262

Easy
Medium
Hard

What it asks you to do

SHARE OF QUESTIONS

Calculation48%
Concept24%
Data or graph19%
Recall5%
Multi-step5%

Coverage

How much of the chapter NEET has used

We split the chapter into 65 ideas. In ten years NEET built a question around 14 of them. Most of the chapter has never been asked, which is why learning it whole beats memorising past questions.

Asked as the main idea: 14
Touched on in a question: 6
Never asked: 45

Topics

What repeats, topic by topic

Questions per topic in each year's paper. Topics that come every year are worth learning first.

Chemical Kinetics · Every year21
2222222322

’17’18’19’20’21’22’23’24’25’26

Topic	2017	’18	2019	’20	2021	’22	2023	’24	2025	’26	Total
Chemical KineticsEvery year	2	2	2	2	2	2	2	3	2	2	21

03+questions in that year’s paper

Chemical Kinetics
Expect a short numerical problem (one or two formula steps, four numeric options) about Chemical Kinetics; a conceptual single-answer item (reasoning rather than recall) is the next most likely shape. Past framings centre on: numerical; compare first and second order reactions.

Drill down

Topic, idea, question

Open a topic to see every idea NEET tested inside it, then open an idea to read the questions. Each row shows its ten papers.

topicAskedShareYears’17’18’19’20’21’22’23’24’25’26

Open21 · 100%100%10/102222222322
14 ideas inside
- Repeated4 · 19%19%4/10
- Repeated3 · 14%14%3/10
- 2 · 10%10%1/102
- 2 · 10%10%1/102
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10

Squares are the ten papers, 2017 to 2026; darker means more questions. Share is of the level above.

Ideas

The exact ideas NEET has asked

Inside the topics, 14 different ideas were tested. These came more than once, or are new since 2024.

First Order Integrated Rate Law4×
numerical
Arrhenius Plot Interpretation3×
numerical
Arrhenius Equation at Two TemperaturesNew2×
identify data needed for a quantity
General Half-Life Formula2×
compare first and second order reactions
Zero Order Completion TimeNew1×
numerical
First Order 99.9% Completion ShortcutNew1×
numerical

Idea	Times	Usually asked as
First Order Integrated Rate Lawnumerical	4	Numerical
Arrhenius Plot Interpretationnumerical	3	Figure-based
Arrhenius Equation at Two Temperaturesidentify data needed for a quantity	2	NumericalNew
General Half-Life Formulacompare first and second order reactions	2	One-line MCQ
Zero Order Completion Timenumerical	1	NumericalNew
First Order 99.9% Completion Shortcutnumerical	1	NumericalNew

Every question

Chemical Kinetics questions, year by year

The opening words of each question as it appeared in the official paper.

NEET 20262 questions

Q60 $\mathrm{2A\xrightarrow{k}B}$ is a zero-order reaction, where k = 1.0 mol L $^{-1}$ min $^{-1}$ . If the initial concentration of A is 2 M,…Numerical
Q64For an elementary chemical reaction, the Arrhenius plot is given below. If the energy of activation is 6.64 kJ mol $^{-1}$ and R = 8.3 J…Figure-based · figure

NEET 20252 questions

Q56If the half-life ( $t_{1/2}$ ) for a first order reaction is 1 minute, then the time required for 99.9% completion of the reaction is…Numerical
Q89If the rate constant of a reaction is 0.03 s $^{-1}$ , how much time does it take for 7.2 mol L $^{-1}$ concentration of the reactant to get…Numerical

NEET 20243 questions

Q55Which plot of ln k vs $\frac{1}{T}$ is consistent with Arrhenius equation?Figure-based · figure
Q70Activation energy of any chemical reaction can be calculated if one knows the value ofOne-line MCQ
Q88The rate of a reaction quadruples when temperature changes from 27°C to 57°C. Calculate the energy of activation. Given R = 8.314 J…Numerical

NEET 20232 questions

Q55Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : A reaction can have…Assertion–reason
Q65For a certain reaction, the rate = k[A] $^2$ [B], when the initial concentration of A is tripled keeping concentration of B constant, the…Numerical

NEET 20222 questions

Q85The given graph is a representation of kinetics of a reaction. The y and x axes for zero and first order reactions, respectively areFigure-based · figure
Q92For a first order reaction A $\to$ Products, initial concentration of A is 0.1 M, which becomes 0.001 M after 5 minutes. Rate constant for…Numerical

NEET 20212 questions

Q77For a reaction A $\to$ B, enthalpy of reaction is −4.2 kJ $\mathrm{mol^{-1}}$ and enthalpy of activation is 9.6 kJ $\mathrm{mol^{-1}}$ . The…Figure-based · figure
Q98The slope of Arrhenius Plot $\left(\ln k \text{ v/s } \frac{1}{T}\right)$ of first order reaction is $-5\times10^{3}$ K. The value of…Numerical

NEET 20202 questions

Q109An increase in the concentration of the reactants of a reaction leads to change in :One-line MCQ
Q132The rate constant for a first order reaction is $4.606\times10^{-3}$ s $^{-1}$ . The time required to reduce 2.0 g of the reactant to 0.2 g…Numerical

NEET 20192 questions

Q63If the rate constant for a first order reaction is k, the time (t) required for the completion of 99% of the reaction is given by :Numerical
Q67For the chemical reaction $N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)$ the correct option is :One-line MCQ

NEET 20182 questions

Q79The correct difference between first- and second-order reactions is thatOne-line MCQ
Q84When initial concentration of the reactant is doubled, the half-life period of a zero order reactionOne-line MCQ

NEET 20172 questions

Q81A first order reaction has a specific reaction rate of $10^{-2}$ $\mathrm{sec^{-1}}$ . How much time will it take for 20 g of the reactant…Numerical
Q88Mechanism of a hypothetical reaction $\mathrm{X_2 + Y_2 \to 2XY}$ is given below (i) $\mathrm{X_2 \to X + X}$ (fast) (ii)…One-line MCQ

Questions from the official NEET UG papers published by NTA (CBSE before 2019). Topic and idea tags, counts and notes are Lumi’s.

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