Which one of the following is not oxidized by acidified `KMnO_4` ?
Which one of the following is not oxidized by acidified `KMnO_4` ?
A. Sodium oxalate
B. Potassium iodide
C. Ferrous sulphate
D. Sodium sulphate
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Correct Answer - D
Sodium sulphite is oxidised to sodium sulphate
`Na_2SO_3 + [O] to Na_2SO_4 (2KMnO_4 + 3H_2SO_4 to K_2SO_4 + 2MnSO_4 + 3H_2O + 5 [O])`
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