Advertisements
Advertisements
Question
What is the role of silica in the extraction of copper?
Advertisements
Solution
Ores of copper contain iron oxide as impurity. Silica reacts with iron oxide and forms iron silicate, which is removed as slag.
FeO+SiO2→FeSiO3
Iron oxide Silica Iron silicate
(Slag)
APPEARS IN
RELATED QUESTIONS
Write the names and chemical formulae of any one ore of iron.
What is the chemical composition of malachite?
- CuO . CuC03
- Cu(OH)2 CuC03
- CuO.Cu(OH)2
- Cu2O . Cu(OH)2
Fe2O3 is reduced to spongy iron near the top of blast furance by
(A) H2
(B) CaO
(C) SiO2
(D) CO
Indicate the principle behind the method used for the refining of zinc.
Write the names and chemical formulae of any ‘two’ minerals of aluminium.
Why does copper obtained in the extraction from copper pyrites have a blistered appearance?
Copper has the face centred cubic structure. The coordination number of each ion is:
What are the differences between minerals and ores?
Which of the following reactions occur during calcination?
(i) \[\ce{CaCo3 -> CaO + CO2}\]
(ii) \[\ce{2FeS2 + 11/2 O2 -> Fe2O3 + 4SO2}\]
(iii) \[\ce{Al2O3. {x}H2O -> Al2O3 + {x}H2O}\]
(iv) \[\ce{ZnS + 3/2 O2 -> ZnO + SO2}\]
Calamine and Malachite, respectively, are the ores of ______.
