A LevelChemistryCambridge (CIE)Exam Questions13. An Introduction to AS Level Organic ChemistryFormulas, Functional Groups & the Naming of Organic Compounds

Formulas, Functional Groups & the Naming of Organic Compounds (Cambridge (CIE) A Level Chemistry): Exam Questions

Exam code: 9701

45 mins18 questions

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Formulas, Functional Groups & the Naming of Organic Compounds

Easy
Medium
Hard
1
1 mark

What is the correct formula for 1-fluoro-3-methylbut-2-ene?

A

Displayed

Displayed formula of 1-fluoro-3-methylbut-2-ene with the methyl group incorrectly placed on carbon 2

B

Empirical

C5H9F

C

Skeletal

Incorrect skeletal formula omitting the fluorine atom and double bond with the branch on the wrong carbon

D

Structural

CH2FCH2C(CH3)CH3

    Choose your answer

    2
    1 mark

    Which molecules are hydrocarbons?

    Four molecules labelled 1 to 4: molecules 1 and 2 contain only carbon and hydrogen; molecules 3 and 4 contain additional elements

    1

    2

    3

    4

    A

    ✓

    ✓

    ✓

    ✓

    B

    ✓

    ✓

    ✓

    ⨯

    C

    ✓

    ✓

    ⨯

    ⨯

    D

    ⨯

    ⨯

    ⨯

    ✓

      Choose your answer

      3
      1 mark

      What is the name of the circled functional group?

      Structural formula of an organic molecule with a C=O carbonyl group bonded to two carbon atoms, with the carbonyl group circled

      • aldehyde

      • alkene

      • carboxylic acid

      • ketone

      Choose your answer

      4
      1 mark

      What is the systematic name of the molecule shown?

      Displayed formula of a branched pentane chain with a chloro group and a methyl group as substituents

      • 2-chloro-3-ethylbutane

      • 2-chloro-3-methylpentane

      • 2-ethyl-3-chlorobutane

      • 3-methyl-4-chloropentane

      Choose your answer

      1
      1 mark

      Compound A, C6H12O2, is produced by the oxidation of compound B, C6H14O.

      Which functional group is present in compound B?

      • carbonyl

      • carboxyl

      • ester

      • hydroxyl

      Choose your answer

      2
      1 mark

      What is the systematic name of the molecule shown?

      Skeletal formula of a branched hexane chain with three methyl substituents at positions 2, 4 and 4

      • 2,3,3-tetramethylpentane

      • 2,4,4-trimethylhexane

      • 2-ethyl-2,4-dimethylpentane

      • 3,3,5-trimethylhexane

      Choose your answer

      3
      1 mark

      Which molecule contains an aldehyde functional group?

      • CH3CH2CH2COCH3

      • CH3CH2CH2COOH

      • CH3CH2COOCH3

      • CHOCH2CH(OH)CH2CH3

      Choose your answer

      4
      1 mark

      Xylitol is an artificial sweetener used in toothpaste.

      Structural formula of xylitol showing a five-carbon chain with five hydroxyl groups, two at the terminal carbons (primary alcohols) and three on the internal carbons (secondary alcohols)

      Which functional groups could be produced if xylitol is oxidised under suitable conditions?

      alkene

      aldehyde

      carboxylic acid

      ketone

      A

      ⨯

      ✓

      ✓

      ✓

      B

      ⨯

      ✓

      ⨯

      ✓

      C

      ⨯

      ✓

      ⨯

      ⨯

      D

      ✓

      ⨯

      ⨯

      ⨯

        Choose your answer

        5
        1 mark

        Which row identifies the functional groups and structural formula of 4-hydroxybutanenitrile?

        group 1

        group 2

        structural formula

        A

        carboxyl

        amide

        HOOCCH2CH2CONH2

        B

        hydroxyl

        amine

        HOCH2CH2CH2CH2NH2

        C

        hydroxyl

        nitrile

        CH3CH(OH)CH2CN

        D

        hydroxyl

        nitrile

        HOCH2CH2CH2CN

          Choose your answer

          6
          1 mark

          How many stereoisomers does 3-chloropent-2-ene have?

          • 0

          • 2

          • 3

          • 4

          Choose your answer

          1
          1 mark

          Limonene is found in the peel of citrus fruits.

          q2-hard-3-1-introduction-to-organic-chemistry

          What are the empirical and molecular formulae of limonene?

          Empirical formula

          Molecular formula

          A

          C5H8

          C10H16

          B

          C5H9

          C10H18

          C

          C9H13

          C9H13

          D

          C10H16

          C10H16

            Choose your answer

            2
            1 mark

            What is the structural formula of 2,2-dibromo-4-methylhexane?

            • CH3CBr2CH(CH3)CH2CH2CH3

            • CH3CBr2CH2CH(CH3)CH2CH3

            • CH3CHBrCBr(CH3)CH2CH2CH3

            • CH3CHBrCH(CH3)CHBrCH2CH3

            Choose your answer

            3
            1 mark

            What is the systematic name of the molecule shown?

            ocr-as-4-1h-mcq-q1-molecule

            • 3,4,5-trimethylhept-3-ene

            • 3,4,5-trimethylhept-4-ene

            • 4-ethyl-1,2,3-trimethylpent-2-ene

            • 5-ethyl-3,4-dimethylhex-3-ene

            Choose your answer

            4
            1 mark

            Which row is correct?

            Systematic name

            General formula

            Skeletal formula

            Structural formula

            A

            2-methylpropanal

            CnH2n+2O

            2-methylpropanal

            CH3CH(CH3)CHO

            B

            4-methylhexan-2-one

            CnH2nO

            4-methylhexan-2-one

            CH3CH2CH(CH3)CH2COCH3

            C

            4-methylpentylamine

            CnH2n+1NH2

            4-methylpentylamine

            CH3CH2CH2CH(CH3)CH2NH2

            D

            ethyl propanoate

            CnH2nO2

            ethyl-propanoate

            CH3COOCH2CH2CH3

              Choose your answer