Question

Choose the option depicting the correct match of the ore and the concentration method used for them.

Column A	Column B
(a) Copper glance	(i) Froth floatation
(b) Bauxite	(ii) Magnetic separation
(c) Siderite	(iii) Leaching

• A. a: iii; b: ii; c: i
• B. a: ii; b: iii; c: i
• C. a: i; b: ii; c: iii
• D. a: i; b: iii; c: ii

Answer 1

The correct option is C a: i; b: ii; c: iii

Copper glance is a sulphide ore of copper. Since copper glance is a sulphur-containing ore so the suitable method for its concentration will be Froth flotation.

Bauxite is an ore of aluminium. Concentration of bauxite is carried out by Leaching.
The ore is dissolved in NaOH solution and ${\mathrm{Al}}_2{O}_3$ is extracted out as sodium aluminate.

Siderite is an iron ore and it can be separated from the non-magnetic gangue particles by magnetic separation