Which of the following is used for refining of petroleum?
A
Steam distillation
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B
Distillation under reduced pressure
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C
Solvent extraction
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D
Fractional distillation
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Solution
The correct option is D Fractional distillation Fractional distillation is used for the refining of petroleum.
Petroleum is a mixture of various compounds having small differences in their boiling point. Fractional distillation is very useful in this case because it can separate all the components of the mixture (like petrol, diesel, kerosene, etc.)