An industrial chemist is analyzing three hydrocarbon fractions, XXX, YYY, and ZZZ, obtained from the fractional distillation of crude oil as shown in the diagram.
The average carbon chain lengths for these fractions are C6 C_6\,C6 for Fraction XXX, C14C_{14}C14 for Fraction YYY, and C24C_{24}C24 for Fraction ZZZ.
Which of the following statements correctly compares the physical properties of these fractions?
Fraction ZZZ is collected higher up the distillation column than Fraction XXX and is more viscous.
Fraction XXX has a higher boiling point than Fraction YYY and is easier to ignite.
Fraction YYY has stronger intermolecular forces than Fraction XXX but is more volatile than Fraction ZZZ.
Fraction ZZZ has shorter carbon chains than Fraction YYY and is less viscous.
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.