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

Some chemical reactions of organic compounds

21 practice questions

Start practising (21 questions)

Practice questions

1–10 of 21

  1. Question 1

    1 mark · Easy

    State the reaction type for the process where a hydrocarbon reacts with excess oxygen to form carbon dioxide and water.

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  2. Question 2

    3 marks · Easy

    Classify each of these organic reactions as addition, substitution, or combustion.

    (a)

    C2H4(g) + H2(g) C2H6(g)

    [1 mark]
    (b)

    CH4(g) + Cl2(g) CH3Cl(g) + HCl(g)

    [1 mark]
    (c)

    C3H8(l) + 5O2(g) 3CO2(g) + 4H2O(l)

    [1 mark]
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  3. Question 3

    2 marks · Easy

    Explain why the reaction between ethene (C2H4) and bromine (Br2) is classified as an addition reaction.

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  4. Question 4

    3 marks · Easy

    The table shows equations for three organic reactions. Use the information to answer the questions.

    Table 1: Organic reactions
    EquationType (to classify)
    C2H6(g) + Cl2(g) → C2H5Cl(g) + HCl(g)
    C2H4(g) + HCl(g) → C2H5Cl(g)
    C2H6(g) + O2(g) → CO2(g) + H2O(l)
    (a)

    Reaction 1: State the reaction type.

    [1 mark]
    (b)

    Reaction 2: State the reaction type.

    [1 mark]
    (c)

    Reaction 3: State the reaction type.

    [1 mark]
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  5. Question 5

    1 mark · Easy

    What type of reaction occurs when one atom or group in a molecule is replaced by a different atom or group?

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  6. Question 6

    3 marks · Easy

    Classify each reaction below as substitution, addition, or combustion. For each, briefly state the reason for your answer.

    (a)

    But-2-ene reacts with hydrogen to form butane.

    [1 mark]
    (b)

    Methane reacts with fluorine to form fluoromethane and hydrogen fluoride.

    [1 mark]
    (c)

    Propanol burns in excess oxygen to produce carbon dioxide and water.

    [1 mark]
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  7. Question 7

    2 marks · Easy

    Propane () burns in a large supply of oxygen.

    (a)

    Write the balanced chemical equation for the complete combustion of propane.

    [2 marks]
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  8. Question 8

    2 marks · Easy

    Consider the following reaction: .

    (a)

    State the type of reaction shown and explain your answer.

    [2 marks]
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  9. Question 9

    2 marks · Normal

    State the type of reaction for each of the following. Give your answers as 'addition', 'substitution', or 'combustion'.

    (a)

    Methane reacts with chlorine to form chloromethane and hydrogen chloride.

    [1 mark]
    (b)

    Ethanol burns in oxygen to produce carbon dioxide and water.

    [1 mark]
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  10. Question 10

    4 marks · Normal

    The following reactions involve organic compounds.

    (a)

    Write the type of reaction (addition, substitution or combustion) for each equation below:

    (i)
    [1 mark]
    (ii)
    [1 mark]
    (b)

    Explain how an addition reaction differs from a substitution reaction, using an example from the equations above.

    [2 marks]
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