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When a salt is heated with dilute H(2)SO...

When a salt is heated with dilute `H_(2)SO_(4) " and " KMnO_(4)` solution, the pink colour of `KMnO_(4)` is discharged, the salt is :

A

a sulphite

B

a carbonate

C

a nitrate

D

a bicarbonate

Text Solution

Verified by Experts

The correct Answer is:
A
`SO_(3)^(2-)` reduces `KMnO_(4)` to colourless `Mn^(2+)`
`5SO_(3)^(2-)+2MnO_(4)^(-) +6H^(+) to 2Mn^(2+) + 5SO_(4)^(2-)+3H_(2)O`
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Knowledge Check

  • When a salt is heated with dil H_(2)SO_(4) and KMnO_(4) soin the pink colour of KMnO_(4) is dicharged the mixture may contain

    A
    Sulphite
    B
    Carbonate
    C
    Nitrate
    D
    Bicarbotate

  • The colour of KMnO_(4) is due to

    A
    `L rarr M` charge transfer transition
    B
    `sigma-sigma^(**)` transition
    C
    `M rarrL` charge transfer transition
    D
    d-d transition

  • The colour of KMnO_(4) is due to

    A
    `M rarr L` charge transfer transition
    B
    `d rarr d` transition
    C
    `L rarr M` charge transfer transition
    D
    `sigma rarr sigma` transition

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