JEE Main 2019ChemistryGeneral Principles and Processes of Isolation of MetalsEasyMCQ

JEE Main 2019 — General Principles and Processes of Isolation of Metals Question with Solution

JEE Main 2019 (10 Jan Shift 2)

Question

The electrolytes usually used in the electroplating of gold and silver, respectively, are:

Choose an option

Show full solutionCorrect option: D
Correct answer
DAuCN2- and AgCN2-

Step-by-step explanation

The solution of dicyano complexes of gold (Au) and silver (Ag) are used as electrolytes while performing electroplating with them.

The amine complexes of gold are not stable, so, they cannot be used.

Silver cyanide is employed as cyanide reacts with silver to form stable complexes.

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About this question

This is a previous-year question from JEE Main 2019, covering the General Principles and Processes of Isolation of Metals 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.