Question

why charcol is obtain from wood

Answer 1

Charcoal is the lightweight black carbonand ash residue hydrocarbon produced by removing water and other volatile constituents from animal and vegetation substances. Charcoal is usually producedby slow pyrolysis — the heating of wood or other substances in the absence of oxygen (see char and biochar).

Answer 2

Charcoal has the following benefits :
a) it burns without flames
b) comparatively smokeless ( wen compared to plain firewood)
c) and it has higher heat generation efficiency