Roasting of sulphides gives the gas X as...

Roasting of sulphides gives the gas X as a by product. This is a colourless gas with choking smell of burnt sulphur and causes great damage to repiratory organs as a result of acid rain. Its aqueous solution is acidic, acts as reducing agent and its acid has never been isolated. The gas X is :-

`H_(2)S`

`SO_(2)`

`CO_(2)`

`SO_(3)`

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The correct Answer is:

`SO_(2)` gas is obtained when any sulphide ore is roasted.
`2M_(2)S+3 O_(2)overset(Delta)rarr 2M_(2)O + 2 SO_(2)`
This gas exhibits all the characteristics that are given in the question.

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