Isolation Metals
During the process of electrolytic refining of copper
During the process of electrolytic refining of copper, some metals present as impurity settle as 'anode mud'. These are
- Ag and Au
- Sn and Ag
- Fe and Ni
- Pb and Zn
In the context of the Hall-Heroult process for the extraction of Al
In the context of the Hall-Heroult process for the extraction of Al, which of the following statements is false?
- Al2O3 is mixed with CaF2 which lowers the melting point of the mixture and brings conductivity
- Al3+ is reduced at the cathode to form Al
- Na3AlF6 serves as the electrolyte
- CO and CO2 are produced in this process
Aluminium is extracted by the electrolysis of
Aluminium is extracted by the electrolysis of
- bauxite
- molten cryolite
- alumina mixed with molten cryolite
- alumina
Cyanide process is used for the extraction of
Cyanide process is used for the extraction of
- barium
- aluminium
- silver
- boron
Which one of the following ores is best concentrated by froth flotation method
Which one of the following ores is best concentrated by froth flotation method?
- Cassiterite
- Malachite
- Magnetite
- Galena