JEE Main 2024 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 4 April 2024, Shift 2, Chemistry Q85

Question 85 of 90 in this shift, Chemistry question 25 of 30, Section B.

Consider the following reaction, the rate expression of which is given below

\mathrm{A + B \rightarrow C}

rate = k

[\mathrm{A}]^{1/2}

[\mathrm{B}]^{1/2}

The reaction is initiated by taking 1 M concentration of A and B each. If the rate constant (k) is

4.6 \times 10^{-2}\ \mathrm{s^{-1}}

, then the time taken for A to become 0.1 M is ______ sec. (nearest integer)

Official answer

NTA final key.

Chapter: Chemical Kinetics
Topic: Rate Laws
Idea tested: Fractional Order Kinetics

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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.