When MnO2 is fused with KOH , a coloured compound is formed, the product and its colour are

Question

When MnO2 is fused with KOH , a coloured compound is formed, the product and its colour are (A)  KMnO4 , purple (B)  K2MnO4 , dark green (C)  Mn2O3 , brown (D)  Mn3O4 , black

Tardigrade Admin · Accepted Answer

When blackish coloured compound MnO2 is fused with KOH in presence of air, produces a dark green colored compound potassium manganate. underset overset textblackish textcolourMnO2 + 4 KOH + O2 xrightarrow textFuse underset overset textpotassium mangnate text(green coloured)2K2MnO4 + H2O

Q. When $M n O_{2}$ is fused with $K O H$ , a coloured compound is formed, the product and its colour are

$K M n O_{4}$ , purple

$K_{2} M n O_{4}$ , dark green

$M n_{2} O_{3}$ , brown

$M n_{3} O_{4}$ , black

When blackish coloured compound $M n O_{2}$ is fused with $K O H$ in presence of air, produces a dark green colored compound potassium manganate.
$colour blackish M n O_{2} + 4 K O H + O_{2} Fuse (green coloured) potassium mangnate 2 K_{2} M n O_{4} + H_{2} O$

Q. When MnO2​ is fused with KOH , a coloured compound is formed, the product and its colour are

KMnO4​ , purple

K2​MnO4​ , dark green

Mn2​O3​ , brown

Mn3​O4​ , black