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

Ethanol burns in air

19 practice questions

Start practising (8 questions)

Practice questions

1–8 of 8 · Normal

  1. Question 1

    2 marks · Normal

    State the names of the two products formed when ethanol burns completely in air.

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  2. Question 2

    4 marks · Normal

    Ethanol is a member of the alcohol homologous series. When ethanol is burned in air, it reacts with oxygen.

    (a)

    Write a balanced chemical equation for the complete combustion of ethanol.

    [2 marks]
    (b)

    Give one use of ethanol as a fuel and explain why it is considered a biofuel.

    [2 marks]
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  3. Question 3

    3 marks · Normal

    Calculate the minimum mass of oxygen needed to completely burn 4.6 g of ethanol ( 2H5OH). (Molar masses: C = 12, H = 1, O = 16)

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  4. Question 4

    3 marks · Normal

    Explain why burning ethanol as a fuel is considered more sustainable than burning petrol. Include reference to raw materials and renewability.

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  5. Question 5

    4 marks · Normal

    The table shows the mass of carbon dioxide produced when different masses of ethanol are burned completely in air.

    Data for combustion of ethanol
    Mass of ethanol burned (g)Mass of carbon dioxide produced (g)
    2.34.4
    4.68.8
    6.913.2
    (a)

    Describe the relationship between the mass of ethanol burned and the mass of carbon dioxide produced.

    [1 mark]
    (b)

    Calculate the mass of carbon dioxide produced when 11.5 g of ethanol is completely burned.

    [2 marks]
    (c)

    Suggest a reason why your answer in part b might be slightly lower in a real experiment.

    [1 mark]
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  6. Question 6

    1 mark · Normal

    Which of the following is the balanced chemical equation for the complete combustion of ethanol in air?

    1. A.\ce{C2H5OH + 2O2 -> 2CO + 3H2O}
    2. B.\ce{C2H5OH + 3O2 -> 2CO2 + 3H2O}
    3. C.\ce{C2H5OH + O2 -> CO2 + H2O}
    4. D.\ce{C2H5OH + 2O2 -> CO2 + 2H2O}
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  7. Question 7

    2 marks · Normal

    Alcohols including ethanol have similar chemical properties. State one other alcohol (by name or formula) and describe what is observed when it burns in air.

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  8. Question 8

    4 marks · Normal

    Ethanol is used in spirit burners for heating in a laboratory.

    (a)

    Draw the displayed formula of ethanol.

    [2 marks]
    (b)

    Complete the following word equation for the combustion of ethanol: ethanol + _____ → carbon dioxide + _____

    [2 marks]
    Answer and see the solution →