JEE Main · 2021 · 27 Aug 2021 · Shift 2 · d and f Block Elements

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

Answer: (D)

Solution

On heating near

513 K

potassium permanganate decomposes:

2 KMn O_{4} Δ K_{2} Mn O_{4} + Mn O_{2} + O_{2} .

The potassium manganate formed holds manganese in the

+ 6

state, a

3 d^{1}

configuration with one unpaired electron, so it is paramagnetic, and it is intensely green. The product is paramagnetic and green.

JEE Main · 2021 · 27 Aug 2021 · Shift 2 · Single correct option