Charcoal is obtained by heating wood, nutshells, bones, sugar end even blood in limited supply of air.
It is the most common type of charcoal, it is prepared by heating of wood In a limited supply of air, it is used in the absorbing of poisonous gases,
it is formed when sugar Is dehydrated either by burning of sugar in a limited supply of sir or by the action of concentrated tetraoxosulphate (vi) acid.
It is formed by the heating of bones end animal remains in limited supply of air. It is used to decolorize sugar.