SubjectCover

Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit

Organic Chemistry

785 practice questions

Start practising (317 questions)

Topics covered

Practice questions

1–10 of 317 · Easy

  1. Question 1

    1 mark · Easy

    State the molecular formula of ethene.

    Answer and see the solution →

  2. Question 2

    3 marks · Easy

    (a)

    Draw the displayed formula of methane.

    [1 mark]
    (b)

    Write the molecular formula of methane.

    [1 mark]
    (c)

    Give the empirical formula of methane.

    [1 mark]
    Answer and see the solution →

  3. Question 3

    2 marks · Easy

    A compound has the empirical formula CH2. Its relative molecular mass is 56. Calculate its molecular formula. Show your working.

    Answer and see the solution →

  4. Question 4

    2 marks · Easy

    Explain the difference between a structural formula and a molecular formula for an organic compound. Give an example for each.

    Answer and see the solution →

  5. Question 5

    3 marks · Easy

    The table shows information about three organic compounds.

    CompoundType of formulaFormula
    ethanemolecularC2H6
    propeneempiricalCH2
    butanedisplayed
    (a)

    State the type of formula shown for propene.

    [1 mark]
    (b)

    Complete the table: Give the displayed formula for butane.

    [1 mark]
    (c)

    Write the empirical formula for ethane.

    [1 mark]
    Answer and see the solution →

  6. Question 6

    1 mark · Easy

    Name the type of formula that shows all the bonds between atoms in a molecule.

    Answer and see the solution →

  7. Question 7

    3 marks · Easy

    (a)

    State the empirical formula of ethene.

    [1 mark]
    (b)

    Write the molecular formula of ethene.

    [1 mark]
    (c)

    Draw the displayed formula of ethene.

    [1 mark]
    Answer and see the solution →

  8. Question 8

    2 marks · Easy

    A hydrocarbon has the empirical formula CH. If the molar mass of the compound is 78 g/mol, calculate its molecular formula. Show your working.

    Answer and see the solution →

  9. Question 9

    1 mark · Easy

    State the name of the homologous series that has the general formula .

    Answer and see the solution →

  10. Question 10

    3 marks · Easy

    (a)

    What is meant by the term "functional group" in organic chemistry?

    [1 mark]
    (b)

    State the functional group found in carboxylic acids.

    [1 mark]
    (c)

    Explain why the functional group is important in a homologous series.

    [1 mark]
    Answer and see the solution →