Two ores A and B were taken. On heating ore A gives CO2 whereas, ore B gives SO2 . What steps will you take to convert them into metals?

Soln:

Ore A gives CO2 on heating hence it is a carbonate ore Steps involved in Extraction of ore A

1. Calcination

Ore is heated in limited supply of air to obtain metal oxide ACO3 AO+ CO2

1. Reduction

Metal oxide is reduced with coke to obtain metal. AO+C A+ CO

Ore B is a sulphide ore

Steps involved in extraction of element B are

1. Roasting

Ore is heated in presence of air to obtain metal oxide 2BS+3O₂ 2BO+2SO₂

1. Reduction

Metal oxide is reduced to metal by carbon BO+C B+CO