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JEE Main 2021 — Electrochemistry Question with Solution

JEE Main 2021 (22 Jul Shift 1)

Question

Assume a cell with the following reaction Cu(s)+2Ag+1×10-3M→Cu2+(0.250M)+2Ag(s)
Ecell ∘=2.97 V

Ecell  for the above reaction is         V.

(Nearest integer)

[ Given : log2.5=0.3979, T=298 K]

Enter your answer

Show full solutionCorrect answer: 3
Correct answer
3

Step-by-step explanation

E=E°-0.0592logCu+2Ag+2
=2.97-0.0592log0.2510-32=2.81 V

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About this question

This is a previous-year question from JEE Main 2021, 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.