Question

Observe above pie chart and answer the following questions. .I react with water and give dark brown rust who I am……… *​

Answer 1

i.  A=Pyrolusite oreMnO2, B=Potassium manganateK2MnO4, C=Potassium permanganateKMnO4

Reactions involved:

2MnO2+4KOH+O2→2K2MnO4+2H2O

(Green)Manganate ionMnO42−Electrolytic oxidationin alkaline solution(Purple)Permanganate ion2MnO4−+e−

ii. In acidic medium, K2MnO4 changes to give purple coloured compound along with black precipitate.

Answer 2

Answer:

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