Chemistry · Macromolecules

Coke is almost pure carbon obtained from destructive distillation of coal Because of its high carbon content, it is widely used as a reducing agent in metallurgical industries. Coal tar, petroleum, and coal gas are mixtures, not pure carbon.

Incorrect. Coal tar is a complex mixture of hydrocarbons, derived from the carbonization of organic materials. It contains various organic compounds and is primarily used in the production of dyes, medicines, and in road construction, but it does not serve as a reducing agent in industrial processes.

Incorrect. Petroleum is a viscous liquid composed of a complex mixture of hydrocarbons with varying boiling points. It is mainly utilized as fuel and in the chemical industry but does not qualify as a pure carbon compound.

Incorrect. Coal gas is a gaseous mixture containing methane, hydrogen, and carbon monoxide. It is primarily used as a fuel but lacks the characteristics of a solid carbon form and does not function as a reducing agent.

Correct. Coke is nearly pure carbon produced through the destructive distillation of coal. Due to its high carbon content, it is extensively used as a reducing agent in metallurgical industries, particularly in the manufacture of iron and steel.