Below are the steps showing how refining of petroleum is carried out, but in the wrong sequence.
Arrange them in the correct sequence. [3]
A The hydrocarbons with the highest boiling points condense first.
B They get separated in the fractionating tower to form the different fractions.
C Crude oil is first heated to about 400 °C in a furnace.
D The vapours formed are passed into a tall fractionating tower.
E Vapours get collected near the base of the fractionating tower.
F As the vapour rises, the hydrocarbons with lower boiling points condense at different heights
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cd are answer
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