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JEE Main 2016 — Electrochemistry Question with Solution

From: JEE Main 2016 (Online) 10th April Morning Slot

Question

Identify the correct statement :

Choose an option

Show full solutionCorrect option: D
Correct answer
DCorrosion of iron can be minimized by forming an impermeable barrier at its surface.

Step-by-step explanation

The two conditions necessary for the corrosion of iron to take place are presence of moisture and oxygen. Factors that catalyse the process of rusting are the presence of carbon dioxide, acids and impurities. It can be minimised by introducing of a barrier film between surface of iron and atmosphere. This can be done by

(i) painting the surface.

(ii) coating the surface with oil or grease.

(iii) electroplating iron with non-corrosive metals such as nickel or chromium.

(iv) covering the surface of iron with layer of more active metal with higher oxidation potential like zinc.

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About this question

This is a previous-year question from JEE Main 2016, 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.