O LevelChemistryCambridge (CIE)Exam Questions11. Organic Chemistry11.1 Formulae, Functional Groups & Terminology

Formulae, Functional Groups & Terminology (Cambridge (CIE) O Level Chemistry): Exam Questions

Exam code: 5070

3 hours33 questions

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11.1 Formulae, Functional Groups & Terminology

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1
1 mark

Which of the following formulae shows an alkane?

  • C2H4

  • C4H8

  • C4H10

  • C5H10

Choose your answer

2
1 mark

Which of the following structures shows a compound that belongs to a different homologous series to octane?

q2-easy-mcq-11-1-organic-chemistry-cie-igcse-chemistry

    Choose your answer

    3
    1 mark

    The diagram shows the structure of ethene.

    q3-1-easy-mcq-11-1-organic-chemistry-cie-igcse-chemistry

    Which of these compounds has similar chemical properties of ethene?

    q3-2-easy-mcq-11-1-organic-chemistry-cie-igcse-chemistry

      Choose your answer

      4
      1 mark

      The structures of four organic compounds are shown. 

      Which one does not show the displayed formula of the compound?

      6e58eed3-267c-44d1-9b45-7e7907f0f840

        Choose your answer

        5
        1 mark

        Which of the following is not a feature of a homologous series? 

        • Compounds have the same functional group 

        • Compounds have the same physical properties

        • Compounds have the same general formula

        • Compounds have similar chemical properties 

        Choose your answer

        6
        1 mark

        Butene and octene belong to the same homologous series.

        What would be the same for butene and octene?

        • Boiling point

        • Number of hydrogen atoms per molecule

        • Relative molecular mass

        • Functional group

        Choose your answer

        1
        1 mark

        The structures of six organic compounds are shown.

        Six structures labelled A to F. A is a single carbon atom bonded to three H and one Br. B is two carbon atoms joined by a double bond, each also bonded to two H. C is a central carbon atom bonded to four CH3 groups. D is a chain of two carbon atoms, each bonded to three H. E is a chain of three carbon atoms, the two end carbons each bonded to three H and the middle carbon bonded to two H. F is a chain of five carbon atoms, the two end carbons each bonded to three H and the three middle carbons each bonded to two H.

        Which two compounds are isomers of one another?

        • B and D

        • A and C

        • C and F

        • C and E

        Choose your answer

        2
        1 mark

        Which compound is an alkane?

        • C31H33

        • C31H60

        • C31H62

        • C31H64

        Choose your answer

        1
        1 mark

        The first three members of a homologous series are shown.

        q5-medium-mcq-11-1-organic-chemistry-cie-igcse-chemistry

        Why do these molecules represent a homologous series?

        • They contain carbon and hydrogen atoms.

        • They have saturated bonds.

        • They have the same functional group.

        • They react differently from each other.

        Choose your answer

        2
        1 mark

        Which pair of the following structures shows a homologous series?

        q6-medium-mcq-11-1-organic-chemistry-cie-igcse-chemistry

          Choose your answer

          3
          1 mark

          P, Q and R are three consecutive members of the same homologous series.

          P has the smallest relative molecular mass of the three and R has the largest.

          P burns in excess oxygen to form carbon dioxide and water only.

          Which statement about Q and R must be correct?

          • Q and R have the same molecular formula as P

          • Q and R have a different general formula from P

          • Q and R have lower boiling points than P

          • Q and R form the same products as P on complete combustion

          Choose your answer

          4
          1 mark

          The displayed formula of an organic compound is shown.

          Four-carbon chain C–C–C–C. First carbon bonded to three H. Second carbon bonded to two H. Third carbon bonded to one H and an –OH group. Fourth carbon bonded to three H.

          What is the name of this compound?

          • butan-1-ol

          • butan-2-ol

          • butan-3-ol

          • butanol

          Choose your answer

          5
          1 mark

          W, X, Y and Z are the first four members of the carboxylic acid homologous series, but not necessarily in that order.

          The table shows their relative molecular masses, Mr​.

          substance

          relative molecular mass, Mr​

          W

          60

          X

          88

          Y

          46

          Z

          74

          Which sequence shows the substances in order of decreasing boiling point?

          • X → Z → W → Y

          • Y → W → Z → X

          • W → X → Y → Z

          • Z → X → W →Y

          Choose your answer