Question
i) Name the method of refining of nickel
ii) what is the role of cryolite in the extraction of aluminium
iii) what is the role of limestone in the extraction of iron from its oxides ?
Solution
(i) Mond’s Process use in the refining of nickel
(ii)The melting point of alumina is very high. It is dissolved in cryolite which lowers the melting point and brings conductivity / acts as a solvent.
(iii)Limestone is decomposed to CaO ,which removes silica impurity of the ore as slag.
