1.

When a salt is heated with dil. H_2 SO_4 and KMnO_4 solution, the pink colour of KMnO_4 is discharged, the mixture contains

Answer»

sulphite
corbonate
nitrate
bicarbonate

Solution :`SO_(3)^(2-)` reduces `KMnO_(4)` and COLOUR of `KMnO_(4)` is discharged
`5SO_(3)^(2-) +2MnO_(4)^(-) + 6H^(+) to 2Mn^(2+) +5SO_(4)^(2-) +3H_(2)O`


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