Question

The correct order of the products collected from the fractional distillation column from top to bottom is:

• A. Petrol, petroleum gas, kerosene and bitumen.
• B. Petroleum gas, kerosene, petrol, and bitumen.
• C. Petrol, kerosene, petroleum gas and bitumen.
• D. Petroleum gas, petrol, kerosene and bitumen.

Answer 1

The correct option is D

Petroleum gas, petrol, kerosene and bitumen.

• Fractional distillation is the process of separating crude oil into its constituent parts or fractions.
• The principle of fractional distillation is that different constituent liquids of petroleum boil at different temperatures.
• The constituents with the higher boiling points will condense in the lower parts of the column while substances with a lower boiling point will condense at the top.
• The increasing order of boiling point of the different components of crude oil is: petroleum gas < petrol < kersosene < bitumen
• Hence, the correct order of the products collected from the fractional distillation column from top to bottom is: petroleum gas, petrol, kersosene and bitumen.