Statement (I) : Fusion of MnO2 with KOH and an oxidising agent gives dark green K2MnO4.

Question

Given below are two statements : 

Statement (I) : Fusion of \(MnO_2\) with KOH and an oxidising agent gives dark green \(K_2MnO_4\). 

Statement (II) : Manganate ion on electrolytic oxidation in alkaline medium gives permanganate ion. 

In the light of the above statements, choose the correct answer from the options given below. 

(1) Both Statement I and Statement II is true 

(2) Both Statement I and Statement II is false 

(3) Statement I is true but Statement II is false 

(4) Statement I is false but Statement II is true

Answer 1

Correct option is (1) Both Statement I and Statement II is true

\(MnO_2 + 4KOH + O_2 \xrightarrow {fused} \underset {Dark\,green}{2K_2MnO_4} + 2H_2O\)

Electrolytic oxidation in alkaline medium : 

At anode :

\(MnO^{2-}_4 \rightarrow MnO^-_4 + e^-\)