The diagram below shows a simplified version of a fractionating column used in the petroleum industry.
The compounds with the lowest boiling points are condensed at position
A)A
B)B
C)C

Question

The diagram below shows a simplified version of a fractionating column used in the petroleum industry. 
The compounds with the lowest boiling points are condensed at position
A)A 
B)B 
C)C

Quizplus · Accepted Answer

The compounds with the lowest boiling points will condense and turn back into a liquid at the highest point in the column where it is coolest. This corresponds to point A, which is at the top of the column.

The Diagram Below Shows a Simplified Version of a Fractionating