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Friday, 9 October

JEE Main 2026 · ChemistryNumerical answerNumerical valueEasyData or graph

JEE Main 5 April 2026, Shift 2, Chemistry Q75

Question 75 of 75 in this shift, Chemistry question 25 of 25, Section B.

For 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 as given below. The value of xx in the given figure is __________ s (Nearest integer)

The figure, in words

Graph of t_1/2 (s) on y-axis vs [A]_0 (mol L^-1) on x-axis: a straight line through the origin. Dashed guides: at [A]_0 = 4x10^-3 the t_1/2 is 240; at [A]_0 = 1.5x10^-3 the t_1/2 is x.

Official answer

90

NTA final key.

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

Same idea in other shifts

Asked 2× in all
  1. 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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.