Question

When $MnO_{2}$ is fused with KOH and $O_{2}$ what is the product formed and its colour?

$MnO_{2} + KOH + O_{2} \rightarrow \underline{?} + H_{2}O$

• A. MnO – colourless
• B. $KMnO_{4} -$purple
• C. $K_{2}MnO_{4}$- dark green
• D. $MnO_{3} -$black

Answer 1

Answer: (C)

$K_{2}MnO_{4}$- dark green

Answer 2

$2MnO_{2} + 4KOH + O_{2} \rightarrow \underset{Darkgree}{2K_{2}MnO_{4}} + 2H_{2}O$