IGCSEScienceCambridge (CIE)Combined ScienceChemistryExam Questions11. Organic ChemistryFuels

Fuels (Cambridge (CIE) IGCSE Combined Science: Chemistry): Exam Questions

Exam code: 0653

4 mins3 questions
1
1 mark

Petroleum is separated by fractional distillation.

Which fraction is used as a fuel in diesel engines?

  • naphtha

  • gasoline

  • gas oil

  • refinery gas

Choose your answer

2
1 mark

The diagram shows a fractionating column used in the separation of petroleum.

Diagram of a fractionating column showing crude oil entering at the base and different fractions, labelled R, S and others, exiting at various heights

Which row explains why fraction R is collected above fraction S?

boiling point of R

average chain length of R

A

higher than S

longer than S

B

higher than S

shorter than S

C

lower than S

longer than S

D

lower than S

shorter than S

    Choose your answer

    3
    2 marks

    Petroleum is a mixture of hydrocarbons.

    The mixture is separated using the fractional distillation apparatus shown in Fig. 5.1.

    Diagram of a petroleum fractionating column showing petroleum entering and separating into refinery gas, gasoline, naphtha, gas oil and bitumen

    Two fractions obtained from the distillation of petroleum are refinery gas and gasoline.

    State one use of each of these fractions.

    refinery gas: ..................

    gasoline: ..................

    How did you do?