Question

In the destructive distillation of coal, at 443-503 K temperature, a middle oil or carbolic oil fraction is obtained. This fraction contains :

• A. Phenol
• B. Xylene
• C. Naphthalene
• D. Benzene

Answer 1

Answer: (A), (C)

The correct options are
A Phenol
C Naphthalene

(3) Distillation of coal tar : Arenes are isolated by fractional distillation of coal tar,

Table :

Name of the fraction

Temperature range (K)

Main constituents

Light oil (or crude oil) fraction	Upto 443	Benzene, toluene, xylene
Middle oil fraction (Carbolic oil)	443-503	Phenol, naphthalene, pyridine
Heavy oil fraction (Creosote oil)	503-543	Naphthalene, naphthol and cresol
Green oil (Anthracene oil)	543-633	Anthracene, phenanthrene
Pitch (left as residue)	Non-volatile	Carbon

So at 443-503 K temperature phenol and naphthalene is formed

Hence options A & C are correct.