Give the steps in the extraction of metals of low and medium reactivity from their respective sulphide ores.

Explanation

Extraction of low reactive metals:
Step 1: Concentration of ore by froth flotation
Step 2: Conversion of metal sulphide to its oxide by heating with air
Step 3: Decompositon of metal oxide into crude metal by stong heating
Step 4: Electrolytic refining
Extraction of medium reactive metals.
Step 1: Concentration of ore by froth flotation.
step 2: Coversion of metal sulphide to its oxide by roasting
Step 3: Reduction of metal oxide to curde metal by heating with reducing agents like aluminium and carbon
Step 4: Electrolytic refining.