please answer this
Dear student
The correct option is 2. Froth floatation
The Cassiterite is obtained in pure form by froth floatation process.
The Cassiterite is then mixed with approximately equal volumes of charcoal dust and a mixture of Sodium and Potassium carbonates (as a flux). The crucible used must have a lid to prevent atmospheric Oxygen from forming excessive Carbon dioxide.
During smelting, the flux helps to remove impurities from the metal being formed.
The overall reaction (upon heating) is:
SnO2 (s) + 2 C (s) --> Sn (l) + 2 CO (g)
Regards
The correct option is 2. Froth floatation
The Cassiterite is obtained in pure form by froth floatation process.
The Cassiterite is then mixed with approximately equal volumes of charcoal dust and a mixture of Sodium and Potassium carbonates (as a flux). The crucible used must have a lid to prevent atmospheric Oxygen from forming excessive Carbon dioxide.
During smelting, the flux helps to remove impurities from the metal being formed.
The overall reaction (upon heating) is:
SnO2 (s) + 2 C (s) --> Sn (l) + 2 CO (g)
Regards