1.

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:

Answer»

a sulphite
a carbonate
a nitrate
a bicarbonate

Solution :`SO_(3)^(2-)` reduces `KNnO_(4)` to COLOURLESS `Mn^(2+)`
`5SO_(3)^(2-) + 2MnO_(4)^(-) + 6H^(+) to 2Mn^(2+) +5SO_(4)^(2-) +3H_(2)O`


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