JEE Main 2022ChemistryChemical KineticsEasyNumerical

JEE Main 2022 — Chemical Kinetics Question with Solution

JEE Main 2022 (25 Jul Shift 2)

Question

For the decomposition of azomethane. CH3 N2CH3g→CH3CH3g+N2 a first order reaction, the variation in partial pressure with time at 600 K is given as

The half life of the reaction is____×10-5 s

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Show full solutionCorrect answer: 2
Correct answer
2

Step-by-step explanation

For first order reaction

k=1tlnP0P-kt=lnPP0lnPP0=-kt

Slope=-k=-3.465×104k=3.465×104

For a first order reaction,Half-life is related to rate constant as given below

t1/2=ln2k=0.6933.465×104=2×10-5seconds

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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.