International ASChemistryEdexcelExam Questions1. Structure, Bonding & Introduction to Organic ChemistryIntroductory Organic Chemistry

Introductory Organic Chemistry (Edexcel International AS Chemistry): Exam Questions

Exam code: XCH11

18 mins18 questions
Easy
Medium
Hard
1
1 mark

The anti-inflammatory drug ketoprofen has the structure shown.

eKhRtOCq_q7

What is the molecular formula of ketoprofen?

  • C15H12O3

  • C16H13O3

  • C16H14O3

  • C16H17O3

Choose your answer

2
1 mark

What is the skeletal formula of 2-chloro-4,4-dimethylhexane?

q13-paper-2-jan-2021-edexcel-ial-chemistry

    Choose your answer

    3
    1 mark

    A substance is labelled with the hazard symbol shown.

    Red diamond with black exclamation mark, symbolising a hazard warning for health risks or general caution.

    What is the meaning of this symbol?

    • Corrosive

    • Health hazard

    • Irritant

    • Toxic

    Choose your answer

    4
    1 mark

    Which of these molecules can show geometric isomerism?

    • CH2=CH2

    • CH2=CHCH3

    • (CH3)2C=CH2

    • CH3CH=CHCH3

    Choose your answer

    5
    1 mark

    Consider the reaction:

    Chemical reaction showing ethanol converting to ethene and water, with an arrow indicating the process from left to right.

    What type of reaction is this?

    • Addition

    • Condensation

    • Elimination

    • Substitution

    Choose your answer

    6
    1 mark

    The displayed formula of a compound is shown.

    Structural formula of propanal, showing a chain of three carbon atoms with hydrogen and oxygen atoms attached.

    Which functional group is present in the compound shown?

    • Aldehyde

    • Ketone

    • Carboxylic acid

    • Ester

    Choose your answer

    7
    1 mark

    The skeletal formula of a hydrocarbon is shown.

    A simple black outline of a regular hexagon on a white background, featuring six equal sides and six angles, with no additional details or colours.

    What is its molecular formula?

    • C5H10

    • C6H10

    • C6H12

    • C6H14

    Choose your answer

    1
    1 mark

    What is the structure of 2-bromo-3-chloro-2-methylbutane?

    q10-paper-2-june-2021-edexcel-ial-chemistry

      Choose your answer

      2
      1 mark

      How many structural isomers have the formula C3H6Cl2?

      • 2

      • 3

      • 4

      • 5

      Choose your answer

      3
      1 mark

      What is the systematic name of this compound?

      q14-paper-1-june-2021-edexcel-ial-chemistry

      • 1,1,2-trimethylpent-4-ene

      • 2,3-dimethylhex-5-ene

      • 4,5-dimethylhex-1-ene

      • 4,5,5-trimethylpent-1-ene

      Choose your answer

      4
      1 mark

      What is the IUPAC name of this alkane?

      q14-paper-1-jan-2021-edexcel-ial-chemistry

      • 2-ethyl-4,5-dimethylheptane

      • 6-ethyl-3,4-dimethylheptane

      • 3,4,6-trimethyloctane

      • 3,5,6-trimethyloctane

      Choose your answer

      5
      1 mark

      What is the name of the alcohol shown?

      Chemical structure of isobutanol, showing a linear chain of four carbon atoms with a hydroxyl group (OH) attached to the last carbon.

      • 2-methylbutan-4-ol

      • 3-methylbutan-1-ol

      • 3-methylbutan-2-ol

      • 2-methylpentan-1-ol

      Choose your answer

      6
      1 mark

      An organic compound X reacts with aqueous sodium carbonate to produce effervescence. The infrared spectrum of X is shown.

      Graph of transmittance versus wavenumbers in cm⁻¹. Peaks and troughs indicate spectral data, with transmittance ranging from 0 to 1.

      Which is compound X?

      • Chemical structure of propanal, showing a linear chain with a carbon double-bonded to oxygen (C=O) and a single hydrogen atom.
      • Chemical structure of propanoic acid.
      • Structural formula of propan-1-ol, showing a three-carbon chain with an -OH group attached to the end carbon, representing the alcohol functional group.
      • Chemical structure of propanone, showing a central carbon atom double-bonded to an oxygen atom and single-bonded to two methyl groups.

      Choose your answer

      1
      1 mark

      How many isomers, including stereoisomers, have the molecular formula C3H5Cl?

      • 4

      • 5

      • 6

      • 7

      Choose your answer

      2
      1 mark

      How many structural isomers of C6H14 contain a carbon atom that is bonded to exactly three other carbon atoms?

      • 2

      • 3

      • 4

      • 5

      Choose your answer

      3
      1 mark

      A saturated hydrocarbon contains one ring of carbon atoms. Its relative molecular mass, Mr, is 70.0.

      How many structural isomers fit this description?

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

      • 3

      • 4

      • 5

      • 6

      Choose your answer

      4
      1 mark

      Consider these four pairs of compounds.

      1. methylcyclopentane and hex-2-ene

      2. cyclohexene and hexa-1,3-diene

      3. Z-hex-2-ene and E-hex-3-ene

      4. cyclohexane and hexa-1,3-diene

      How many of these pairs are pairs of structural isomers?

      • 1

      • 2

      • 3

      • 4

      Choose your answer

      5
      1 mark

      Hydrocarbon Y has the empirical formula CH2 and a relative molecular mass, Mr, of 84.0.

      Y shows geometric isomerism.

      Which is Y?

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

      • CH3CH=CHCH2CH2CH3

      • CH2=C(CH3)CH2CH2CH3

      • CH3CH=CHCH2CH3

      • CH2=C(CH3)CH2CH3

      Choose your answer