What happens when coal is heated in air give any two uses of coal?
When heated in air, coal burns and produces mainly carbon dioxide gas. Coal can be processed in industry to get some useful products such as coke, coal tar and coal gas. Coal is used as a fuel in industries and was used to cook food. It was used in railway engines to produce steam to run the engine.
When coal is heated in the absence of air it does not form?
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.
What carbon is produced when coal is strongly heated in the absence of air?
When coal is heated strongly in the absence of air, a gaseous fuel is obtained. This fuel is a mixture of carbon dioxide, methane, and hydrogen. Coke is also a product of such a process.
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 absence of oxygen?
In the carbonization process coal is heated to about 1000 degrees Celsius in the absence of oxygen. (If oxygen is not excluded from this process, combustion would occur and the only solid product would be ash.) … This process is called coal liquefaction.
When coal is heated in the absence of oxygen the process is called?
Coke is obtained by burning of coal in absence of oxygen. The process is called destructive distillation. USES: Coke is used to manufacture steel.
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 happens when coal tar is distilled Class 8?
Coal tar is obtained by cooling the gas that is formed during the destructive distillation of coal to approximately ambient temperature. … The part of coke-oven tar that is normally distillable at atmospheric pressure boils at up to ~400 °C and contains principally aromatic hydrocarbons.
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.