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Saturday, 31 October

JEE Main 2023 · ChemistryNumerical answerNumerical valueMediumConceptual

JEE Main 10 April 2023, Shift 2, Chemistry Q87

Question 87 of 90 in this shift, Chemistry question 27 of 30, Section B.

The number of incorrect statement/s from the following is ____________ A. The successive half lives of zero order reactions decreases with time. B. A substance appearing as reactant in the chemical equation may not affect the rate of reaction C. Order and molecularity of a chemical reaction can be a fractional number D. The rate constant units of zero and second order reaction are mol L−1 s−1\mathrm{mol\ L^{-1}\ s^{-1}} and mol−1 L s−1\mathrm{mol^{-1}\ L\ s^{-1}} respectively

Official answer

1

NTA final key.

Chapter
Chemical Kinetics
Topic
Integrated Rate Equations
Idea tested
Zero Order Half-Life

Same idea in other shifts

Asked 3× in all
  1. 5 Apr 2026, Shift 2 · Q75For a reaction A→P\mathrm{A\to P} at T K, the half life (t1/2t_{1/2}) is plotted as a function of initial concentration [A]0[\mathrm{A}]_0 of A…EasyNumerical valueHas a figure
  2. 2 Apr 2025, Shift 1 · Q72For the reaction A →\rightarrow products. The concentration of A at 10 minutes is ___________ ×10−3\times10^{-3} mol L−1\mathrm{L^{-1}}…MediumNumerical valueHas a figure

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.