Question

Refining of petroleum does not involve.

• A. Simple distillation
• B. Steam distillation
• C. Fractional distillation
• D. Distillation under reduced pressure

Answer 1

Answer: (A), (C), (D)

Simple distillation
Distillation under reduced pressure
Fractional distillation

The steam distillation process works on the principle that when a mixture of two or more undissolved liquids are heated, while ensuring that the surfaces of both liquids are in contact with the atmosphere, the vapor pressure exerted by the system increases. This method is used for the refining of petroleum.

So, simple distillation, fractional distillation, distillation under reduced pressure are not involved in the refining of petroleum.
Options A, C, and D are correct answers.