What happen when coal is heated in the absence of oxygen?
It is a tough and porous black solid substance. It is prepared by heating coal in the absence of air. 1)When coal is heated in the absence of air,then coal gas and coal tar are eliminated,and coke is left behind as a black residue. 2)Coke is an almost pure form of carbon.It is 98% carbon.
What is the process called when coal is heated in the absence of air at 10000 C Name the four products of this process?
Bitumen , coal tar , coke , coal gas are some of the substances which are produced by the heating in the absence of air at 10,000 Celsius. This process is known as destructive distillation. Explanation: coal tar is the petroleum product which can be used in metallic of roads.
Which product is obtained after heating coal in absence of air?
Coal gas is also an important commercial product obtained by the destructive distillation of coal. It is a gaseous fuel and is produced from coal when coal is heated in absence of air. The byproducts of coal gas are coal tar and coke.
What happens when coal is heated in the presence of air?
If coal is heated in the presence of air, then coal burns to produce mainly carbon dioxide gas, and no other useful products are obtained. It is a gaseous fuel that is obtained by the strong heating of coal in the absence of air during the processing of coal to get a coke.
What advantage does coke have over coal as a fuel?
(i) Coke produces more heat than an equal mass of coal. (ii) It produces ni smoke on burning and leaves no residue and as such does not cause air pollution. (iii) It is used as a reducing agent in the extraction of metals from their ores.
How is coal tar formed?
Coal tar is obtained by cooling the gas that is formed during the destructive distillation of coal to approximately ambient temperature. It is a black, viscous liquid composed primarily of a complex mixture of condensed-ring aromatic hydrocarbons.