In neutral or faintly alkaline medium, thiosulphate is quantitatively oxidized by `KMnO_4` to

Options

A. `SO_(3)^(2-)`
B. `SO_(4)^(2-)`
C. `SO_2`
D. `SO_(5)^(2-)`

Answer

B

Explanation

In neutral or alkaline medium, thiosulphate is quantitively oxidized by `KMnO_4` to `SO_(4)^(2-)`
`8MnO_(4)^(-) + 3S_(2) O_(3)^(2-) + H_(2) O to 8MnO_(2) + 6SO_(4)^(2-) + 2OH^(-)`