JEE Main 2020ChemistryChemical KineticsMediumMCQ

JEE Main 2020 — Chemical Kinetics Question with Solution

JEE Main 2020 (05 Sep Shift 2)

Question

The rate constant (k) of a reaction is measured at different temperature (T), and the data are plotted in the given figure. the activation energy of the reaction in kJmol-1 is : (R is gas constant)

Choose an option

Show full solutionCorrect option: D
Correct answer
D2R

Step-by-step explanation

k=Ae-Ea/RT
In k=InA−EaR1T

In k=InA−EaR×103103T

Slope of graph 

=−EaR×103=−105

Ea=2R×103J

Ea=2R×kJ

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About this question

This is a previous-year question from JEE Main 2020, 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.