BrainIt

Chemistry

Chemical Kinetics

Rate laws, order and molecularity, integrated equations for zero and first order reactions, half-life, and the Arrhenius equation for temperature dependence run through this chapter. NEET numericals dominate: first order half-life problems, rate constant calculations, and reading order from graphs or data tables.

Exam rules change between cycles. Confirm dates, syllabus and pattern against NTA's official site. We are not NTA.

Weightage: what the paper actually did

Chemical Kinetics carried 3 questions in the NEET 2026 paper. One paper is a data point, not a destiny: NTA moves weight between chapters every cycle, which is why the weightage tables deserve care. The stable facts are the paper's shape: 180 questions, 720 marks, +4 right, −1 wrong.

Sample PYQs from this chapter

Real questions NTA asked from Chemical Kinetics, with the answer and the working. Try before you peek.

Question 1 · NEET 2026

Given below is an expression for the rate constant of a first-order reaction occurring at a certain temperature, T (K): ln⁡k=14.34−1.25×104T\ln k = 14.34 - \frac{1.25\times10^4}{T}. The energy of activation in kcal mol−1^{-1} for the reaction is: (Given: k in s−1^{-1}, R = 1.987 cal mol−1^{-1} K−1^{-1})
  1. A.24.84
  2. B.14.34
  3. C.18.63
  4. D.12.42
Answer and explanation

Answer: A

Comparing with the Arrhenius form ln⁡k=ln⁡A−EaRT\ln k = \ln A - \frac{E_a}{RT}, the slope term gives EaR=1.25×104\frac{E_a}{R}=1.25\times10^4. Thus Ea=1.25×104×1.987≈24837E_a = 1.25\times10^4 \times 1.987 \approx 24837 cal mol−1^{-1} ≈24.84\approx 24.84 kcal mol−1^{-1} (A).

How to practise Chemical Kinetics

Chapter by chapter, against real past-paper questions, on a screen: NEET is computer based from 2027. Read the chapter once, then attempt its PYQs until your accuracy stops climbing, and let the wrong answers tell you which lines to reread. If the chapter keeps refusing to stick, that has its own guide. There is also a free 12-question mock on the exam screen.

Nearby Chemistry chapters

Questions

How many questions did Chemical Kinetics have in NEET 2026?

Chemical Kinetics carried 3 questions in the NEET 2026 paper. Weightage shifts between cycles, so treat it as a probability, not a promise.

Where can I practise Chemical Kinetics PYQs for NEET?

In the BrainIt app, free until the 2027 exam: its bank holds 50,000 past NTA questions tagged to all 83 chapters, including this one, with accuracy tracked per chapter. A sample question from this chapter is on this page.

Is Chemical Kinetics important for NEET 2027?

It is part of the Chemistry syllabus the paper draws from, and NEET 2027 is computer based, so practise it on a screen. Your own accuracy in the chapter matters more than any weightage table: a heavy chapter you already score well on needs less time than a light one you keep missing.

Something here wrong or out of date? Email irshad@moonlightart.space and a person will read it.