1.

In neutral or faintly alkaline medium, thiosulphate is quantitatively oxidized by KMnO_(4) is

Answer»

`SO_(3)^(2-)`
`SO_(4)^(2-)`
`SO_(2)`
`SO_(5)^(2-)`

SOLUTION :In neutral or faintly ALKALINE medium THIOSULPHATE is quantitatively oxidized by `KMnO_(4)` to `SO_(4)^(2-)`
`8KMnO_(4)+3Na_(2)S_(2)O_(3)+ H_(2) O to 3K_(2)SO_(4)+8MnO_(2)+3Na_(2)SO_(4)+2KOH`


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