Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
111–120 of 133 · Hard
Question 111
7 marks · Hard
Answer and see the solution →A student mixes methanol and propanoic acid in the presence of a few drops of concentrated sulfuric acid and heats the mixture.
(a)[2 marks]Describe the type of reaction taking place and explain what is meant by 'esterification'.
(b)[3 marks]Draw the displayed formula of the ester formed in this reaction.
(c)[1 mark]State one common use for this ester.
(d)[1 mark]Write the balanced chemical equation (using molecular formulae, not names) for the formation of the ester in part (b).
Question 112
7 marks · Hard
Answer and see the solution →Some esters have pleasant smells and are widely used in everyday products.
(a)[2 marks]Give the systematic name of the ester with molecular formula C3H7COOCH3.
(b)[2 marks]State the names of the alcohol and the carboxylic acid needed to make this ester.
(c)[3 marks]Suggest one use of this ester and explain why esters are suitable for this use.
Question 113
2 marks · Hard
Answer and see the solution →The structure below shows part of a polymer chain.
State the name of the monomer used to make this polymer. Draw the displayed formula of the repeat unit for this polymer.
Question 114
5 marks · Hard
Answer and see the solution →Describe how poly(ethene) is prepared in the chemical industry.
(a)[1 mark]State the name and formula of the monomer used to make poly(ethene).
(b)[2 marks]Write the equation for the polymerisation reaction, using displayed formulae for both the monomer and the polymer's repeat unit, and including 'n' notation.
(c)[1 mark]State the type of reaction used to produce poly(ethene).
(d)[1 mark]Describe the essential conditions needed for this reaction.
Question 115
2 marks · Hard
Answer and see the solution →A student is given the displayed formula for the repeat unit of a polymer:
Deduce the structural formula of the monomer, and write its name.
Question 116
2 marks · Hard
Answer and see the solution →The displayed formula below shows the repeat unit of a polymer formed by addition polymerisation.
State the name and molecular formula of the monomer that forms this polymer.
Question 117
5 marks · Hard
Answer and see the solution →A polymer contains the following repeat unit:
(a)[2 marks]Draw the displayed formula of the monomer used to make this polymer.
(b)[2 marks]Write the name and molecular formula of this monomer.
(c)[1 mark]Explain why the double bond in the monomer is important for the polymerisation reaction.
Question 118
2 marks · Hard
Answer and see the solution →The monomer CH2=CHCH2F can undergo addition polymerisation.
Write the formula for the repeat unit of the polymer formed and state its name.
Question 119
2 marks · Hard
Answer and see the solution →Explain why addition polymers such as poly(propene) persist in the environment for very long periods. Suggest one environmental problem that may result from this persistence.
Question 120
5 marks · Hard
Answer and see the solution →A city is searching for ways to manage its addition polymer waste. Answer the following questions about the disposal of addition polymers.
(a)[1 mark]State what is meant by the term 'biodegradable'.
(b)[2 marks]Explain, using the structure of addition polymers, why most of them are not biodegradable.
(c)[2 marks]Describe two environmental problems caused by the build-up of non-biodegradable addition polymers.