JEE Main 2021ChemistryGeneral Principles and Processes of Isolation of MetalsEasyMCQ

JEE Main 2021 — General Principles and Processes of Isolation of Metals Question with Solution

JEE Main 2021 (26 Aug Shift 2)

Question

Given below are two statements:
Statement I : Sphalerite is a sulphide ore of zinc and copper glance is a sulphide ore of copper.
Statement II : It is possible to separate two sulphide ores by adjusting proportion of oil to water or by using 'depressants' in a froth flotation method.
Choose the most appropriate answer from the options given below :

Choose an option

Show full solutionCorrect option: B
Correct answer
BBoth Statement I and Statement II are true.

Step-by-step explanation

Sphalerite is ZnS

Copper glance is Cu2S

It is possible to separate two sulphide ores by adjusting proportion of oil to water or by using 'depressants'. For example, in case of an ore containing ZnS and PbS, the depressant used is NaCN. It selectively prevents ZnS from coming to the froth but allows PbS to come with the froth.

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About this question

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