Question

White $Mn(OH{)}_2$ becomes green coloured compound in reaction with sodium peroxide. It is:

• A. because of the formation of manganate ions
• B. because of the formation of $Mn(OH{)}_2$
• C. because of the formation of $4M{n}^{2+}$ions
• D. because of the formation of permanganate ions

Answer 1

The correct option is A because of the formation of manganate ions

From manganese(II) hydroxide solution with sodium peroxide gives green hydrated manganese(III) oxide/hydroxide or $MnO\left(OH\right).$

$Mn{\left(OH\right)}_2+H_2{O}_2\to {Mn}_2{O}_3+H_{2}O$