Minerals from which metals can be extracted economically and easily are called ores.The extraction of metals from theirs ores involves the following processes.
(i)Concentration.
(ii)Calcination | roasting | leaching .
(iii)Reduction.
It is carried out be one of the following methods.
Which of the following is not correctly matched ?

Options

A. Red bauxite - Purification by Serpeck's method
B. Iron from haematite - Carbon monoxide reduction
C. Calamine - Carbonate ore
D. `FeSiO_3` - Slag obtained in the extraction of copper

Answer

A

Explanation

Red bauxite container the impurities of iron oxides, titanium oxide and silica which are removed by Baeyer's and Hall's processes . The Serpeck's method is used when bauxite contains ony the impurity of silica.