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Friday, 9 October

JEE Main 2025 · ChemistryMultiple choiceSingle correctEasyCalculation

JEE Main 4 April 2025, Shift 2, Chemistry Q54

Question 54 of 75 in this shift, Chemistry question 4 of 25, Section A.

Half life of zero order reaction A→product\mathrm{A\rightarrow product} is 1 hour, when initial concentration of reactant is 2.0 mol L−12.0\ \mathrm{mol\ L^{-1}}. The time required to decrease concentration of A from 0.50 to 0.25 mol L−10.25\ \mathrm{mol\ L^{-1}} is :
  1. (1)4 hour
  2. (2)0.5 hour
  3. (3)15 minOfficial answer
  4. (4)60 min

Official answer

Option 3

NTA final key.

Chapter
Chemical Kinetics
Topic
Integrated Rate Equations
Idea tested
Zero Order Integrated Rate Law

Same idea in other shifts

Asked 2× in all
  1. 9 Apr 2024, Shift 1 · Q86Given below are two statements : Statement I : The rate law for the reaction A+B→C\mathrm{A + B \rightarrow C} is rate…EasyNumerical 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 42 of the 174 JEE Main shifts held from 2017 to 2026.