When ( MnO\_2 ) is fused with ( KOH ) , a coloured compound... | Chemistry | SolveeIt

Question

When $MnO_2$ is fused with $KOH$ , a coloured compound is formed, the product and its colour are

$KMnO_4$ , purple

$K_2MnO_4$ , dark green

$Mn_2O_3$ , brown

$Mn_3O_4$ , black

Answer

$K_2MnO_4$ , dark green

Explanation

Solution

When blackish coloured compound $MnO_2$ is fused with $KOH$ in presence of air, produces a dark green colored compound potassium manganate.
$\underset{\overset{\text{blackish}}{\text{colour}}}{MnO_2} + 4 KOH + O_2 {->[\text{Fuse}]} \underset{\overset{\text{potassium mangnate}}{\text{(green coloured)}}}{2K_2MnO_4} + H_2O$

Chemistry Question on d block elements

Solution