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When petroleum is heated in a fractionat...

When petroleum is heated in a fractionating column, various fractions are obtained at various heights of the column. More volatile liquid goes upto the top and least volatile liquid remains at the bottom. Various gaseous fractions are condensed according to their boiling points.
What can you say about the boiling points of liquids that collect at the bottom as residue?

A

Their boiling points must be very low.

B

Their boiling points must be much higher than the temperature at the bottom of the column.

C

Their temperature is equal to the temperature of column

D

None of the above.

Text Solution

Verified by Experts

The correct Answer is:
B
Their boiling points must be much higher than the temperature at the bottom of fractionating column hence they do not boil.
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