The starting material for the manufacture of $KMnO_4$ is

Preparation of potassium permanganate from $MnO_2$ involves a two-step process in which the $1^{st}$ step is a reaction with $KOH$ and $KNO_3$ to produce:

Iron on reacting with carbon gives:

Manganese achieves its highest oxidation state in which of the following compounds?

Cigarette or gas lighter is made up of

The green paramagnetic species formed by heating $KMnO_4$ at $513 \ K$ is