Roasting of sulphides gives the gas X as a by product. This is a colorless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic, acts as a reducing agent and its acid has never been isolated. The gas X is:
SO3
H2S
SO2
CO2
As learnt in concept @10255
Roasting is heating of the ore in the presence of air below its fusion temperature.
for instance,
has a choking smell and causes acid rain.
Option 1)
SO3
This solution is incorrect.
Option 2)
H2S
This solution is incorrect.
Option 3)
SO2
This solution is correct.
Option 4)
CO2
This solution is incorrect.
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