JEE Main 2017ChemistryElectrochemistryMediumMCQ

JEE Main 2017Electrochemistry Question with Solution

JEE Main 2017 (02 Apr)

Question

Given
ECl2/Cl-o=1.36V, ECr3+/Cro= -0.74V
ECr2O72-/Cr3+o=1.33V, EMnO4-/Mn2+o=1.51V.
Among the following, the strongest reducing agent is:

Choose an option

Show full solutionCorrect option: D
Correct answer
DCr

Step-by-step explanation

Strongest reducing agent has the highest tendency to get oxidised. Higher the oxidation potential, higher is the tendency to get oxidised. Reduction potential of Cr3+ is least (ECr3+/Cro= -0.74V) which indicates that oxidation potential of Cr is highest (ECr/Cr3+o= 0.74V). Thus, Cr is strongest reducing agent.

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About this question

This is a previous-year question from JEE Main 2017, 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.