An industrial chemical refinery uses a fractional distillation column to separate crude oil into different useful fuel fractions, as shown in the diagram below:
Which of the following statements correctly compares the physical properties of Fraction P P\,P and Fraction QQQ?
Fraction PPP has a lower boiling point, is more volatile, and ignites more easily than Fraction QQQ.
Fraction PPP is more viscous, has a higher boiling point, and burns with a smokier flame than Fraction QQQ.
Fraction QQQ has a lower boiling point, flows more easily, and contains shorter hydrocarbon chains than Fraction PPP.
Both fractions have identical physical properties because they both originate from the same crude oil mixture.
Fuels Questions
Practise Edexcel GCSE Chemistry Fuels with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.