Question

Potassium permanganate on heating at 513 K gives a product which is ______.

Options

• paramagnetic and colourless 

• diamagnetic and green 

• diamagnetic and colourless 

• paramagnetic and green

Answer 1

Potassium permanganate on heating at 513 K gives a product which is paramagnetic and green.

Explanation:

Potassium permanganate on heating at 513 K gives potassium manganate K₂MnO₄ and its colour is green.

\[\ce{2KMnO4 ->[\Delta][513 K] \underset{Green}{K2MnO4} + \underset{Black}{MnO2} + O2}\]

In K₂MnO₄, manganese oxidation state is +6 and hence, it has one unpaired electron and paramagnetic.