Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
Alcohols
130 practice questions
Topics covered
- Drawing and naming the alcohols21 practice questions
- Ethanol burns in air19 practice questions
- Ethanol can be oxidised by heating with potassium dichromate(VI) in dilute sulfuric acid21 practice questions
- Making ethanol by fermentation19 practice questions
- Making ethanol by the hydration of ethene19 practice questions
- Comparing the two methods of producing ethanol20 practice questions
Practice questions
21–30 of 130
Question 21
2 marks · Hard
Answer and see the solution →State the molecular formula for butan-1-ol. Then, state the number of carbon atoms in a molecule of butan-1-ol.
Question 22
1 mark · Easy
Answer and see the solution →State the names of the two products formed when ethanol is completely burned in air.
Question 23
3 marks · Easy
Answer and see the solution →Ethanol, C2H5OH, burns in air.
(a)[1 mark]Write the balanced chemical equation for the complete combustion of ethanol.
(b)[1 mark]State the name of the homologous series to which ethanol belongs.
(c)[1 mark]Name the functional group present in ethanol.
Question 24
2 marks · Easy
Answer and see the solution →Calculate the total number of oxygen atoms in the products formed when one molecule of ethanol combusts completely in air. Show your working.
Question 25
3 marks · Easy
Answer and see the solution →The table shows the volume of carbon dioxide produced when different volumes of ethanol are completely burned in air.
Volumes of ethanol and carbon dioxide from combustion Volume of ethanol burned (cm^3) Volume of CO2 produced (cm^3) 1 2 2 4 3 6 4 8 (a)[1 mark]Describe the relationship between the volume of ethanol burned and the volume of carbon dioxide produced.
(b)[1 mark]Predict the volume of carbon dioxide produced if 5 cm^3 of ethanol is completely burned.
(c)[1 mark]Suggest why the volume of carbon dioxide produced is always double the volume of ethanol burned.
Question 26
3 marks · Easy
Answer and see the solution →The combustion of ethanol can be used as a source of energy in stoves.
(a)[1 mark]Write the molecular formula for ethanol.
(b)[1 mark]Describe what you would observe when ethanol burns in air.
(c)[1 mark]Name one use of ethanol apart from as a fuel.
Question 27
2 marks · Easy
Answer and see the solution →Calculate the mass of carbon dioxide produced when 4.6 g of ethanol burn completely in air.
(Relative atomic masses: C = 12, H = 1, O = 16)
Question 28
2 marks · Easy
Answer and see the solution →Ethanol burns in air to produce two products. Describe, in terms of substances, what is formed when ethanol undergoes complete combustion, and explain why these products are formed.
Question 29
1 mark · Easy
Answer and see the solution →State the name of one product formed when ethanol burns completely in air.
Question 30
2 marks · Normal
Answer and see the solution →State the names of the two products formed when ethanol burns completely in air.