JEE Main 2019ChemistryElectrochemistryMediumMCQ

JEE Main 2019 — Electrochemistry Question with Solution

JEE Main 2019 (10 Jan Shift 1)

Question

Consider the following reduction processes:

Zn2++2e-→Zn(s);Eo=-0.76 V

Ca2++2e-→Ca(s);Eo=-2.87 V

Mg2++2e-→Mg(s);Eo=-2.36 V

Ni2++2e-→Ni(s);Eo=-0.25 V

The reducing power of the metals increases in the order:

Choose an option

Show full solutionCorrect option: C
Correct answer
CNi<Zn<Mg<Ca

Step-by-step explanation

Lower the standard reduction potential more will be the reducing power i.e gets self oxidised.

Therefore the correct order is:

Ni<Zn<Mg<Ca

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About this question

This is a previous-year question from JEE Main 2019, 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.