Acidified potassium permanganate solution is decolourised by - Vidyadip

MCQ

Acidified potassium permanganate solution is decolourised by

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

✓

Answer

Correct option: C.

Mohr's salt

c
(c)Mohr’s salt.

$2KMn{O_4} + 8{H_2}S{O_4} + 10FeS{O_4}\, \to $

${K_2}S{O_4} + 2MnS{O_4} + 5F{e_2}{(S{O_4})_3} + 8{H_2}O$

Mohr’s salt decolourises $KMn{O_4}$ by reducing $M{n^{ + 7}}$ ions to $M{n^{ + 2}}$ ions.

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