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Acidified potassium permanganate soultio...

Acidified potassium permanganate soultion is decoloursied by

A

bleaching powder

B

white vitriol

C

Mohr's salt

D

microcosmic salt

Text Solution

Verified by Experts

The correct Answer is:
C
Mohr's salt is `[FeSO_(4).(NH_(4))_(2)SO.6H_(2)O]`
`underset("purple")(2KmO_(4))+8H_(2)SO_(4)+10FeSO_(4)rarrK_(2)SO_(4)+underset("colourless")(2MnSO_(4))+5Fe_(2)(SO_(4))_(3)+8H_(2)O`
Hence mohr's salt decolourises `KMnO_(4)` by reducing `Mn^(7+)` ion to `Mn^(2+)` ions.
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