Acidified potassium permanganate soultion is decoloursied by

Options

A. Bleaching powder
B. White vitriol
C. Mohr's salt
D. Microcosmic salt

Answer

C

Explanation

`2KMnO_(4)+3 H_(2)SO_(4) rarr K_(2)SO_(4)+2 MnSO_(4)+3 H_(2)O+[O]`
`2 FeSO_(4)+H_(2)SO_(4)+[O] rarr Fe_(2)(SO_(4))_(3)+H_(2)O"]"xx5`
[Mohr-salt]
`2 KMnO_(4)+10 FeSO_(4) +8 H_(2)SO_(4) rarr K_(2)SO_(4)+2 MnSO_(4) + 5Fe_(2) (SO_(4))_(3)+8 H_(2)O`
Mohr-salt reducing agent `KMnO_(4)//H^(+) rarr` oxidising agent.