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Roasting of sulphides given the gas X as...

Roasting of sulphides given the gas `X` as a by producet. This is a colortess gas with choking smell of burnt and causes great dumage to respiratory is acidic, act as a resulting agent and in acid never been isolated .The gas `X` is

A

`So_(2)`

B

`CO_(2)`

C

`SO_(3)`

D

`H_(2)S`

Text Solution

Verified by Experts

The correct Answer is:
a
In the process of roasting, the ore (uaually the sulphide ) is headed in a regular supply air at a temperature below the melting of the metal . The metal is converted to either the oxide sulphate :
`2ZnS+3O_(2) rarr 2ZnO +2SO_(2)`
`2PbS + 3O_(2) rarr 2PbO + 2So_(2)`
`PbS + 2O_(2) rarr PbSO_(4)`
sulphur dioxideis a colorless gas wjth a pungent , suffoceting odor .It is highly soluble in water . It is acidic oxide which dissolves in water to form sulphurous acid `(H_*(2)SO_(3))` which may axist in the solution in minut amounts or no at all . However , its salts (called the sulphides) form stable crystalline solids .
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