The common impurities present in bauxite are:

a. CuO                    

b. ZnO                

c. Fe2O3                

d. SiO2

Choose the correct option:
1. a and b
2. b and c
3. c and d
4. a and d

HINT: Bauxite is an ore of Al.
Bauxite, rock largely composed of a mixture of hydrous aluminum oxides. Bauxite is the principal ore of aluminum.
Bauxite is an ore of aluminium which contain Fe2O3 and SiO2 as common impurities.