Question

Which of the following fraction of coal tar distillation is obtained at $270^{\circ }-360^{\circ }C$ ?

• A. Light oil
• B. Middle oil
• C. Green oil
• D. Heavy oil

Answer 1

Answer: (C)

[a] Light oil fraction is distilled upto $170^{\circ }C$. It has benzene, toluene and xylene.
[b] Middle oil fraction or carbolic oil fraction distills between $170-230^{\circ }C$. It has phenol and pyridine.
[c] Green oil or anthracene oil fraction distills between $270-360^{\circ }C$. It has anthracene and phenanthrene.
[d] Heavy oil distills between $230-270K$. It has methyl and higher alkyl phenols.