Which one of the following reactions does not occur during extraction of copper?
- $CaO + SiO _2 \rightarrow CaSiO _3$
- $2 Cu _2 S +3 O _2 \rightarrow 2 Cu _2 O +2 SO _2$
- $FeO + SiO _2 \rightarrow FeSiO _3$
- $2 FeS +3 O _2 \rightarrow 2 FeO +2 SO _2$
The Correct Option is A
Solution and Explanation
No formation of calcium silicate in extraction of .
So, the correct option is (A): $CaO + SiO _2 \rightarrow CaSiO _3$
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Concepts Used:
General Principles and Processes of Isolation of Elements
What are Ores and Minerals?
Minerals are the naturally occurring, homogeneous inorganic solid substances. They are having a definite chemical composition and crystalline structure, hardness and color. For example, copper pyrite, calamine, etc.
Impurities in an ore are called gauge. The removal of a gauge from the ore is called concentration ore.
Several steps are involved in the extraction of pure metal from ores. Major steps are as follows –
- Concentration of the ore
- Isolation of the metal from its concentrated ore
- Purification of the metal