Question

Which of the following names represents the foul smelling, black, thick, viscous liquid obtained from destructive distillation of coal?

• A. Coke
• B. Coal tar
• C. Coal gas
• D. None of these

Answer 1

Answer: (B)

Coal tar

Coal gas is a flammable gaseous fuel made from coal and supplied to the user via a piped distribution system. Town gas is a more general term referring to manufactured gaseous fuels produced for sale to consumers and municipalities.

Coke is a fuel with few impurities and a high carbon content, usually made from coal. It is the solid carbonaceous material derived from destructive distillation of low-ash, low-sulphur bituminous coal. Cokes made from coal are grey, hard, and porous. While coke can be formed naturally, the commonly used form is man-made. The form is known as petroleum coke, or pet coke is derived from oil refinery coker units or other cracking processes.

Coal tar: a thick, oily liquid consisting mainly of hydrocarbons, produced by the destructive distillation of organic substances such as wood, coal, or peat. Coal tar is among the by-products when coal is carbonized to make coke or gasified to make coal gas.