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On addition of conc. H(2)SO(4) to a chlo...

On addition of conc. `H_(2)SO_(4)` to a chloride salt, colourless fumes are evolved but in case of iodide salt, violet fumes come out. This is because

A

`H_(2)SO_(4)" reduces "HI" to "I_(2)`

B

HI is of violet colour

C

HI gets oxidised to `I_(2)`

D

HI changes to `HIO_(3)`.

Text Solution

Verified by Experts

The correct Answer is:
C
HI being a stronger reducing agent than `H_(2)SO_(4)`, reduces `H_(2)SO_(4)" to "SO_(2)` and is itself oxidised to `I_(2)` (violet fumes).
`MI+H_(2)SO_(4)rarrMHSO_(4)+HI`
`H_(2)SO_(4)rarrH_(2)O+SI_(2)+[O]`
`2HI+[O]rarrH_(2)O+underset("(violet fumes)")(I_(2))`
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