O LevelChemistryCambridge (CIE)Exam Questions11. Organic Chemistry11.3. Fuels

. Fuels (Cambridge (CIE) O Level Chemistry): Multiple Choice Questions

Exam code: 5070

39 mins9 questions

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11.3. Fuels

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1
1 mark

The diagram shows an industrial process involved in the production of a substance that is used as an aircraft fuel.

A tall industrial column with rounded top and bottom. A pipe enters from the left near the base and a pipe leaves the top. Several horizontal trays are drawn inside the column, and outlet pipes leave the right-hand side at different heights. An arrow labelled Substance Q points to one of the outlets in the upper part of the column.

process

substance Q

A

fractional distillation

petrol

B

thermal decomposition

paraffin

C

fractional distillation

paraffin

D

thermal decomposition

petrol

    Choose your answer

    1
    1 mark

    The table below shows 4 different sources of petroleum (crude oil) and their composition.

    Fraction

    Arabian Heavy /%

    Arabian Light /%

    Iranian Heavy /%

    North Sea

    /%

    gasoline

    18

    21

    21

    23

    kerosene

    11.5

    13

    13

    15

    diesel

    18

    20

    20

    24

    fuel oil

    52.5

    46

    46

    38

    Which composition of petroleum would be the best for the motor vehicle industry?

    • North Sea

    • Arabian Heavy

    • Arabian Light

    • Iranian Heavy

    Choose your answer

    2
    1 mark

    Which of the following properties of different compounds in petroleum enable it to be separated into fractions?

    1

    Chain length

    2

    Chemical reactivity

    3

    Solubility in water

    4

    Boiling point

    • 1 & 3

    • 1 & 4

    • 2 & 3

    • 2 & 4

    Choose your answer

    3
    1 mark

    The diagram below shows the apparatus used to separate petroleum (crude oil) into four fractions.

    Laboratory apparatus. A vertical tube holds petroleum soaked on rock wool at its base, labelled Petroleum on rock wool, with heating applied beneath it labelled Heat. A thermometer is inserted into the top of the tube. A delivery tube leads from the tube down into a collecting tube standing in a beaker of water labelled Water, where a liquid gathers, labelled Fraction.

    Which fraction contains the smallest hydrocarbon molecules?

    fraction

    boiling point range / °C

    A

    up to 70

    B

    71 to 120

    C

    121 to 170

    D

    over 171

      Choose your answer

      4
      1 mark

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

      A fractionating column, labelled. Crude oil enters through a pipe near the bottom left, labelled crude oil. Six outlet pipes leave the right-hand side at different heights, labelled from top to bottom P, Q, R, S, T and U, under the heading fraction.

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

      boiling point of R

      average molecular mass of R

      A

      greater than S

      greater than S

      B

      greater than S

      smaller than S

      C

      smaller than S

      greater than S

      D

      smaller than S

      smaller than S

        Choose your answer