JEE Main 2020ChemistryElectrochemistryMediumNumerical

JEE Main 2020 — Electrochemistry Question with Solution

JEE Main 2020 (02 Sep Shift 2)

Question

For the disproportionation reaction 2Cu+aq⇌Cus+Cu2+aq at 298K,ln K  (where K is the equilibrium constant) is _______×10-1

Given :E°Cu2+/Cu+=0.16V E°Cu+/Cu=0.52VRTF=0.025

Enter your answer

Show full solutionCorrect answer: 144
Correct answer
144

Step-by-step explanation

Ecello=ECu+/Cu°-ECu2+/Cu+°

=0.52-0.16=0.36 V

Ecell°=RTnFlnKeq

0.36=0.0251lnk

In k=14.4      =144×10-1

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About this question

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