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
1–10 of 52 · Easy
Question 1
1 mark · Easy
Answer and see the solution →State the number of carbon atoms in a molecule of ethanol.
Question 2
3 marks · Easy
Answer and see the solution →(a)[1 mark]Draw the displayed formula of methanol.
(b)[1 mark]Give the molecular formula for methanol.
(c)[1 mark]State the functional group present in methanol.
Question 3
2 marks · Easy
Answer and see the solution →The displayed formula of an alcohol shows four carbon atoms in a straight chain, with the –OH group attached to the terminal (end) carbon.
Calculate the total number of hydrogen atoms in one molecule of this alcohol. Give your answer using IUPAC naming if possible.
Question 4
2 marks · Easy
Answer and see the solution →Explain why butan-1-ol and propan-1-ol are both classified as alcohols, even though they have a different number of carbon atoms.
Question 5
3 marks · Easy
Answer and see the solution →Table 1. Formulae for some alcohols Name Molecular formula methanol CH4O ethanol C2H6O propan-1-ol C3H8O butan-1-ol C4H10O (a)[1 mark]Name the alcohol with the molecular formula C3H8O.
(b)[1 mark]What pattern do you notice in the number of hydrogen atoms as the number of carbon atoms increases by one?
(c)[1 mark]Predict the molecular formula for the next alcohol in the series after butan-1-ol.
Question 6
1 mark · Easy
Answer and see the solution →What is the displayed formula for ethanol expected to show clearly between the oxygen and hydrogen atoms?
Question 7
3 marks · Easy
Answer and see the solution →(a)[1 mark]Write the IUPAC name of the alcohol with this structural formula: CH3CH2CH2OH.
(b)[1 mark]State the number of carbon atoms in this molecule.
(c)[1 mark]Give the general formula for straight-chain alcohols.
Question 8
2 marks · Easy
Answer and see the solution →Butan-1-ol has the molecular formula C4H10O.
Calculate the number of hydrogen atoms needed to form two molecules of butan-1-ol.
Question 9
1 mark · Easy
Answer and see the solution →State the names of the two products formed when ethanol is completely burned in air.
Question 10
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.