In the context of the Hall-Heroult process for the extraction of Al, which of the following statements is false?
CO and CO2 are produced in this process
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
D.
Na3AlF6 serves as the electrolyte
Titanium is a metal of modern times. It is obtained as oxide. Why it could not be extracted earlier despite its wide occurence?
Name the common elements present in the anode mud in electrolytic refining of copper. Why are they so present?
What criterion is followed for the selection of the stationary phase in chromatography?
What is the role of cryolite in the metallurgy of aluminium?
Why is zinc not extracted from zinc oxide through reduction using CO?
What is the role of graphite rod in the electrometallurgy of aluminium?
Predict conditions under which Al might be expected to reduce MgO.
Mock Test Series
