JEE Main 2022ChemistryChemical KineticsMediumMCQ

JEE Main 2022 — Chemical Kinetics Question with Solution

JEE Main 2022 (24 Jun Shift 2)

Question

For a first order reaction, the time required for completion of 90% reaction is 'x' times the half life of the reaction. The value of 'x' is

(Given: ln10=2.303 and log2=0.3010)

Choose an option

Show full solutionCorrect option: C
Correct answer
C3.32

Step-by-step explanation

ln2t1/2t90%=ln10010=ln10t90%×0.693t1/2=2.303t90%=2.3030693×t1/2=3.32t1/2

Hence, x=3.32

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About this question

This is a previous-year question from JEE Main 2022, covering the Chemical Kinetics chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.