A) Potassium permanganate
B) Potassium iodide
C) Ferrous sulphate
D) Potassium ferrocyanide
Correct Answer: A
Solution :
\[{{H}_{2}}{{O}_{2}}\] reduces acidified \[KMn{{O}_{4}}\] solution. As a result. The pink colour of \[KMn{{O}_{4}}\] is changed.
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