Question

why KMnO4 kept in brown bottle?

Answer 1

Hi friend

Potassium permanganate (KMnO4) stored in dark bottles because to not exposed to light, If it exposed to light it will start decomposing.

Small amount of light can provide enough energy for the permanganate to oxidise water.

Answer 2

KMnO4 is Potassium Permanganate which is kept in a dark bottle, so that it does not come in contact with the Sunlight.

As it would start getting Decomposed.