Question:
In the removal of silica during smelting, the flux used is
In the removal of silica during smelting, the flux used is
Updated On: May 12, 2024
- ferric oxide
- calcium oxide
- cupric oxide
- phosphorus pentoxide
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The Correct Option is B
Solution and Explanation
Calcium oxide acts as a flux and combines with silica to form fusible calcium silicate slag
$ {CaO_{(s)} + SiO_{2(s)} ->[1123 K] $\underset{\text{Calcium silicate (slag)}}{ {CaSiO_{3(s)} }}$ }$
$ {CaO_{(s)} + SiO_{2(s)} ->[1123 K] $\underset{\text{Calcium silicate (slag)}}{ {CaSiO_{3(s)} }}$ }$
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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