Worksheet: Fractional Distillation of Crude Oil

In this worksheet, we will practice describing the use of fractional distillation to separate crude oil and identifying the properties and uses of key fractions.

Q1:

In which of the following are crude oil fractions arranged in order of increasing viscosity?

  • ADiesel oil < gasoline < kerosene
  • BKerosene < diesel oil < gasoline
  • CKerosene < gasoline < diesel oil
  • DGasoline < kerosene < diesel oil
  • EGasoline < diesel oil < kerosene

Q2:

Which of the following is the molecular formula of a hydrocarbon likely to be found in LPG?

  • A C H 1 2 2 6
  • B C H 6 1 4
  • C C H 2 4 5 0
  • D C H 4 1 0
  • E C H 7 0 1 4 2

Q3:

Which of the following is the molecular formula of a hydrocarbon likely to be found in gasoline?

  • A C H 1 6 3 4
  • B C H 3 8
  • C C H 2 4 5 0
  • D C H 8 1 8
  • E C H 6 0 1 2 2

Q4:

Which of the following statements is false?

  • AHeavy fuel oils have higher viscosities than diesel oil.
  • BKerosene is distilled at a lower temperature than diesel oil.
  • CLPG contains shorter hydrocarbon molecules than diesel oil.
  • DLubricating oils ignite more easily than diesel oil.
  • EGasoline has a lower boiling point than diesel oil.

Q5:

Crude oil fractions collected at lower temperatures during fractional distillation exhibit higher values for which of the following physical properties?

  • AMelting point
  • BIgnition temperature
  • CViscosity
  • DVolatility
  • EMolecular size

Q6:

Selected melting and boiling points of compounds extracted from three crude oil fractions are shown in the table.

Compound Melting Point ( C ) Boiling Point ( C )
X 1 3 0 40
Y 48 391
Z 1 4 0 1

In which fraction of crude oil would compound X be found?

  • A Bitumen
  • B LPG
  • C Diesel oil
  • D Gasoline
  • EHeavy fuel oil

In which fraction of crude oil would compound Y be found?

  • A Bitumen
  • B Diesel oil
  • C Gasoline
  • D LPG
  • E Heavy fuel oil

In which fraction of crude oil would compound Z be found?

  • A Bitumen
  • B Gasoline
  • C LPG
  • D Diesel oil
  • E Heavy fuel oil

Q7:

Why are crude oil fractions described as non-renewable resources?

  • A Crude oil use is not sustainable because it is no longer naturally produced.
  • B Crude oil fractions cannot be reused after combustion.
  • C Products made from crude oil fractions are non-recyclable.
  • D Crude oil use is not sustainable because its production is very slow.
  • E Products made from crude oil fractions are non-biodegradable.

Q8:

In which application is kerosene used as the primary fuel?

  • A Cars
  • B Power stations
  • C Domestic heating
  • D Aircraft
  • E Trains

Q9:

Which of the following statements is true?

  • AFractional distillation involves the separation of compounds using a pressure gradient.
  • BFractional distillation involves a chemical reaction.
  • CAll fractions of crude oil are used as fuels.
  • DMost fractions of crude oil are liquids at room temperature.
  • EFractional distillation involves the separation of crude oil into pure compounds.

Q10:

Which variable physical property of crude oil fractions enables their separation by fractional distillation?

  • A Solubility
  • B Melting point
  • C Viscosity
  • D Boiling point
  • E Flammability

Q11:

Which of the following products are not commonly produced using petrochemicals?

  • A Medicines
  • B Paints
  • C Plastics
  • D Cooking oils
  • E Flavorings

Q12:

At which of the following temperatures is crude oil heated at the base of a typical fractionating column?

  • A 1 5 0 C
  • B 5 0 C
  • C 2 5 0 C
  • D 3 5 0 C
  • E 4 5 0 C

Q13:

Which of the following is not an accurate description of crude oil?

  • A Fossil fuel
  • B Finite resource
  • C Nonsustainable
  • D Synthetic
  • E Energy rich

Q14:

Which crude oil fraction is most useful as a fuel for large ships?

  • A Gasoline
  • B LPG
  • C Diesel oil
  • D Heavy fuel oil
  • E Kerosene

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