International ASChemistryEdexcelExam Questions1. Structure, Bonding & Introduction to Organic ChemistryAlkenes

Alkenes (Edexcel International AS Chemistry): Multiple Choice Questions

Exam code: XCH11

2 hours24 questions

Select a download format for Alkenes

Scroll for more

Select an answer set to view for
Alkenes

Easy
Medium
Hard
1
1 mark

Which of these is not a way of limiting global problems caused by polymer disposal?

  • developing biodegradable polymers

  • exporting polymer waste

  • removing toxic waste gases produced by the incineration of polymers

  • reusing products made from polymers

Choose your answer

2
1 mark

Limonene is an oil found in the peel of citrus fruits.

Skeletal formula of limonene: a cyclohexene ring with a CH3 group on one carbon of the ring C=C bond, and a C(CH3)=CH2 side chain on the ring carbon opposite it

Excess bromine is added to limonene at room temperature in the dark.

Which product forms?

Four structures labelled A to D. A: limonene with one Br atom on the ring carbon next to the side chain, and both C=C bonds still present. B: two Br atoms added across the ring C=C bond, one on the carbon bearing the CH3 group, while the C(CH3)=CH2 side chain is unchanged. C: the side chain is now CBr(CH3)CH2Br, while the ring C=C bond is unchanged. D: the side chain is CBr(CH3)CH2Br and two Br atoms are added across the ring, so no C=C bond remains

    Choose your answer

    3
    1 mark

    Poly(chloroethene), PVC, is used to make pipes, window frames and electrical insulation.

    Which statement about PVC is not correct?

    • burning PVC waste produces an acidic gas

    • PVC molecules are unsaturated

    • PVC has the same empirical formula as its monomer

    • the repeat unit of PVC is –CH2–CHCl–

    Choose your answer

    4
    1 mark

    Pent-2-ene, CH3CH2CH=CHCH3, is shaken with cold, dilute, acidified potassium manganate(VII).

    What is the organic product?

    • CH3CH2CH(OH)CH(OH)CH3

    • CH3CH2COCOCH3

    • a mixture of CH3CH2CH(OH)CH2CH3 and CH3CH2CH2CH(OH)CH3

    • CH3CH2CH2CH2CH3

    Choose your answer

    5
    1 mark

    Bromine water is added separately to each of three compounds.

    Which row shows whether each compound decolourises the bromine water?

    √ = decolourises the bromine water

    × = does not decolourise the bromine water

    Table with skeletal formulae of three compounds as column headings: a six-membered carbon ring containing one C=C bond; a branched five-carbon chain containing one C=C bond; a branched six-carbon chain with single bonds only. Row A: tick, tick, tick. Row B: tick, cross, tick. Row C: tick, tick, cross. Row D: cross, tick, tick

      Choose your answer

      6
      1 mark

      How many σ bonds and π bonds are in the C=C double bond of an alkene?

      σ bonds

      π bonds

      A

      0

      2

      B

      1

      1

      C

      1

      2

      D

      2

      0

        Choose your answer

        7
        1 mark

        The repeat unit of an addition polymer is shown.

        Chemical structure of poly(tetrafluoroethene), showing repeating units with carbon-fluorine bonds, enclosed in brackets with a subscript "n".

        What is the monomer used to make this polymer?

        • CF2=CF2

        • CF3–CF3

        • CH2=CF2

        • CHF=CHF

        Choose your answer

        8
        1 mark

        Which reagent and conditions convert ethene into ethanol?

        • hydrogen, heat and an acid catalyst

        • hydrogen, heat and a nickel catalyst

        • steam, heat and an acid catalyst

        • steam, heat and a nickel catalyst

        Choose your answer

        1a
        1 mark

        Geometric isomerism is shown by 2-chlorobut-2-ene.

        What is the skeletal formula of E-2-chlorobut-2-ene?

        (1)

        skeletal-formula

          Choose your answer

          1b
          1 mark

          What is the total number of sigma bonds in Z-2-chlorobut-2-ene?

          • 3

          • 4

          • 10

          • 11

          Choose your answer

          2
          1 mark

          How many isomers with the molecular formula C5H10 contain a C=C double bond?

          Include any E and Z isomers in your count.

          • 5

          • 6

          • 7

          • 8

          Choose your answer

          3
          1 mark

          Eight structural isomers with the molecular formula C4H7Br are shown.

          Skeletal formulae of eight isomers of C4H7Br. Top row: CH2=CHCHBrCH3, BrCH=CHCH2CH3, CH3CBr=CHCH3 and CH2=C(CH3)CH2Br. Bottom row: CH2=CHCH2CH2Br, CH2=CBrCH2CH3, BrCH2CH=CHCH3 and BrCH=C(CH3)2

          How many of these eight isomers show E/Z isomerism?

          • 2

          • 3

          • 4

          • 5

          Choose your answer

          4
          1 mark

          2-methylbut-2-ene, (CH3)2C=CHCH3, reacts with hydrogen bromide.

          What is the major product?

          • 1-bromo-2-methylbutane

          • 2-bromo-2-methylbutane

          • 2-bromo-3-methylbutane

          • 2,3-dibromo-2-methylbutane

          Choose your answer

          5
          1 mark

          Which alkene does not show E/Z isomerism?

          • 1,2-dichloroprop-1-ene

          • 2,2-dimethylhex-3-ene

          • 2,4-dimethylpent-2-ene

          • 2-methylhex-3-ene

          Choose your answer

          6
          1 mark

          A section of a poly(ethenol) chain is shown.

          –CH2–CH(OH)–CH2–CH(OH)–CH2–CH(OH)–

          A sample of poly(ethenol) has a relative molecular mass of 8800.

          Approximately how many monomer units are in each polymer molecule?

          [Ar values: H = 1.0, C = 12.0, O = 16.0]

          • 100

          • 191

          • 200

          • 293

          Choose your answer

          1
          1 mark

          Which alkene reacts with hydrogen chloride to give 2-chloro-3-methylpentane as the major product?

          • CH3CH2C(CH3)=CHCH3

          • CH3CH2CH2CH=CHCH3

          • CH3CH2CH2C(CH3)=CH2

          • CH3CH2CH(CH3)CH=CH2

          Choose your answer

          2
          1 mark

          The diagram shows a section of a polymer chain formed by the random addition polymerisation of three different monomers.

          Section of an addition polymer chain with twelve backbone carbon atoms joined by single bonds. The groups above and below each carbon, from left to right, are: H and H; CH3 and H; CH3 and H; CH3 and H; H and Br; Br and CH3; H and H; H and Br; H and CH3; CH3 and H; H and CH3; H and Br

          Which three monomers could produce this polymer?

          • CH3CH=CHCH3, CH3CH=CHBr and CH2=CBrCH3

          • CH3CH=CHCH3, CH2=CHCH3 and CH3CBr=CHBr

          • CH3CBr=CHBr, CH2=CBrCH3 and CH3CH=CHCH3

          • CH3CH=CHCH3, CH3CH=CHBr and CH2=CHCH3

          Choose your answer

          3
          1 mark

          Alkene X has the molecular formula C6H12.

          • X shows E/Z isomerism

          • X reacts with hydrogen bromide to give only one structural isomer as the product

          What is the organic product when X reacts with cold, dilute, acidified potassium manganate(VII)?

          • 3-bromohexane

          • 2,3-dimethylbutane-2,3-diol

          • hexane-2,3-diol

          • hexane-3,4-diol

          Choose your answer

          4
          1 mark

          A hydrocarbon has the molecular formula C8H12. Its molecules contain no C≡C bonds.

          2.16 g of the hydrocarbon reacts with exactly 6.39 g of bromine, Br2, at room temperature in the dark.

          Which describes one molecule of the hydrocarbon?

          [Ar values: H = 1.0, C = 12.0, Br = 79.9]

          • no rings and two C=C bonds

          • no rings and three C=C bonds

          • one ring and two C=C bonds

          • two rings and one C=C bond

          Choose your answer