Question

Heating the are in the absence of air what is the process

Answer 1

heating ore in absence of air is called roasting it is generally done on the metallurgy of sulphides ore it also remove low boiling like organic impurities.

Answer 2

The various useful products obtained by processing the coal by heating in the absence of air are:

1)Coal gas

2)Coal tar

3)Coke

The strong heating of coal in the absence of air is called destructive distillation of coal.

If coal is heated in the presence of air,then coal burns to produce mainly carbon dioxide gas and no other useful products were obtained.