Question

An ore when heated in absence of air liberates gas that turns lime water milky. Identify the nature of ore and give steps for its extraction

Answer 1

Nature of ore - carbonate ore

steps for extraction are :

1. enrichment of ore - purification of ore or removal of gangue or matrix

2. Calcination- heating of ore at high temp. in absence of air or oxygen

3. Reduction of metal oxide - reducing agent like carbon or coke is used to obtain metal from metal oxide

4. Electrolysis