Roasting of sulphides gives the gas X as a byproduct . This is a colourless 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 :

Options

A. `SO_3`
B. `H_(2)S`
C. `SO_2`
D. `CO_2`

Answer

D

Explanation

Roasting of sulphide ores gives `SO_(2)` with choking smell of burnt sulphur.
`SO_2+ H_(2)O rArr [H_(2)SO_(3)] ltimplies 2H^(+) + SO_(3)^(2-)`
`SO_2` causes acid rain and damage respiratory system.