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On adding of conc. H(2)SO(4) ot a chlor...

On adding of conc. `H_(2)SO_(4)` ot a chloride salt colourless fumes are evolved but in case of iodide salt. Violet fumes come out. This is because

A

HI is of violet colour

B

HI gets oxidised to `I_(2)`

C

HI changes to `HIO_(3)`

D

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

Text Solution

Verified by Experts

HI gets oxidised to `I_(2).2I^(-)+H_(2)SO_(4) to SO_(4)^(2o+)+2HI,`
`H_(2)SO_(4) to H_(2)O+SO_(2)+(O), 2HI+O to H_(2)O +I_(2)`
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Knowledge Check

  • Oleum or fuming H_(2)SO_(4) is

    A
    A mixture of conc. `H_(2)SO_(4)` and oil
    B
    Sulphuric acid which gives fumes of sulphur dioxide
    C
    Sulphuric acid saturated with sulphur trioxide, i.e., `H_(2)S_(2)O_(7)`
    D
    A mixture of sulphuric acid and nitric acid

  • When dilute ferrous (Fe^(2+)) salt solution is added to an aqeous solution containing nitrate (NO_(3)^(-)) ion followed by the addition of conc. H_(2)SO_(4) forms a brown colored ring. What is te chemical composition of the complex that is responsible for this brown colored ring.

    A
    `Fe(NO_(3))_(2)`
    B
    `[Fe(H_(2)O)_(5)(NO)]^(2+)`
    C
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    D
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    A
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    B
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    D
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