Chemical Kinetics is a Class 12 Chemistry chapter that carries about 3.2% of the Chemistry questions in NEET. Practise it with 42 questions covering 2 topics, each with an explanation.
Sets of 15 questions that adapt to your level, with an explanation for every answer.
Across the 13 previous year papers, Chemical Kinetics had 23 questions, about 1.8 a year. The most in one paper was 3, in NEET 2024.
| Paper | Questions from this chapter |
|---|---|
| NEET 2026 | 3 |
| NEET 2025 | 2 |
| NEET 2024 | 3 |
| NEET 2023 | 2 |
| NEET 2022 | 2 |
| NEET 2021 | 2 |
| NEET 2020 | 2 |
| NEET 2019 | 2 |
| NEET 2018 | 2 |
| NEET 2017 | 2 |
| NEET 2016 | 0 |
| Re-AIPMT 2015 | 1 |
| AIPMT 2014 | 0 |
8 questions from the practice bank, spread across the chapter's topics. The full set is in the app.
A first-order reaction is 75% complete in 40 minutes. Its half-life is:
Answer: A. 20 min
Why: 75% completion needs two half-lives (100 → 50 → 25% left), so t½ = 40/2 = 20 min.
If a reaction is second order in A and the concentration of A is doubled, the rate becomes:
Answer: A. four times
Why: Rate ∝ [A]², so doubling [A] multiplies the rate by 2² = 4.
For a zero-order reaction, the half-life is:
Answer: C. directly proportional to the initial concentration
Why: t½ = [A]₀/2k for zero order, so a larger starting concentration takes longer to halve.
The rate constant of a reaction doubles when the temperature is raised from 300 K to 310 K. This approximately indicates an activation energy of:
Answer: B. 53 kJ/mol
Why: ln 2 = (Ea/R)(1/300 − 1/310), giving Ea ≈ 53.6 kJ/mol.
Radioactive decay is an example of a:
Answer: C. first-order reaction
Why: The rate is proportional to the number of nuclei present.
For the reaction 2N₂O₅ → 4NO₂ + O₂, the rate of formation of NO₂ is related to the rate of disappearance of N₂O₅ by:
Answer: B. d[NO₂]/dt = −2 d[N₂O₅]/dt
Why: The stoichiometric coefficients are 4 for NO₂ and 2 for N₂O₅.
A zero-order reaction is one whose rate:
Answer: B. is independent of reactant concentration
Why: For a zero-order reaction, rate = k[A]⁰ = k, meaning the rate is constant and independent of reactant concentration.
Molecularity of a reaction:
Answer: C. is always a whole number and is never zero
Why: Molecularity is the number of species colliding in an elementary step, so it is a positive integer, while order may be fractional or zero.
Chemical Kinetics carries about 3.2% of the Chemistry questions in NEET. Across the 13 previous year papers on NeetVictory it appeared 23 times, about 1.8 questions a year.
Chemical Kinetics is a Class 12 Chemistry chapter in the NCERT syllabus.
NeetVictory has 42 practice questions on Chemical Kinetics, each with an explanation, in sets of 15 that adapt to your level. This page shows a free sample.
NeetVictory