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Saturday, 10 October

JEE Main 2022 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 28 July 2022, Shift 1, Chemistry Q86

Question 86 of 90 in this shift, Chemistry question 26 of 30, Section B.

For the given first order reaction A→B\mathrm{A\to B} the half life of the reaction is 0.3010 min. The ratio of the initial concentration of reactant to the concentration of reactant at time 2.0 min will be equal to __________. (Nearest integer)

Official answer

100

NTA final key (2022 Session 2).

Chapter
Chemical Kinetics
Topic
Rate Laws
Idea tested
First-Order Kinetics

Same idea in other shifts

Asked 2× in all
  1. 6 Apr 2024, Shift 2 · Q85Consider the two different first order reactions given below A+B→CA + B \rightarrow C (Reaction 1) P→QP \rightarrow Q (Reaction 2) The ratio…MediumNumerical value

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.