Q42.The addition of silica during the extraction of copper from its sulphide ore :- (1) converts copper sulphide into copper silicate (2) converts iron oxide into iron silicate (3) reduces copper sulphide into metallic copper (4) reduces the melting point of the reaction mixture
What This Question Tests
Tests knowledge of the role of silica (an acidic flux) in removing basic impurities like iron oxide during the extraction of copper.
Concepts Tested
Formulas Used
FeO + SiO2 -> FeSiO3
📚 NCERT Sections This Tests
4.14 — Describe The Preparation Of Potassium Dichromate From Iron Chromite Ore.
Chemistry Class 11 · Chapter 4
4.14 Describe the preparation of potassium dichromate from iron chromite ore. What is the effect of increasing pH on a solution of potassium dichromate?
2.1 — Arrange The Following Metals In The Order In Which They Displace Each Other
Chemistry Class 11 · Chapter 2
2.1 Arrange the following metals in the order in which they displace each other from the solution of their salts. Al, Cu, Fe, Mg and Zn.
5.14 — What Is The Coordination Entity Formed When Excess Of Aqueous Kcn Is
Chemistry Class 11 · Chapter 5
5.14 What is the coordination entity formed when excess of aqueous KCN is added to an aqueous solution of copper sulphate? Why is it that no precipitate of copper sulphide is obtained when H2S(g) is passed through this solution?
📋 Question Details
- Chapter
- Metallurgy
- Topic
- Extraction of Copper
- Year
- 2021
- Shift
- 27 Jul Shift 2
- Q Number
- Q42
- Type
- MCQ
- NCERT Ref
- Class 12 Chemistry Ch 6: General Principles and Processes of Isolation of Elements
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