Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
311–317 of 317 · Easy
Question 311
5 marks · Easy
Answer and see the solution →Poly(pent-1-ene) is a synthetic addition polymer made from the monomer pent-1-ene.
(a)[2 marks]Draw the displayed formula of the repeat unit of poly(pent-1-ene).
(b)[2 marks]State the name and displayed formula of the monomer used to make poly(pent-1-ene).
(c)[1 mark]Give the type of polymerisation occurring and briefly explain what happens to the double bond in the monomer during the reaction.
Question 312
7 marks · Easy
Answer and see the solution →Answer all parts about alkanes and alkenes.
(a)[1 mark]State the general formula for alkanes.
(b)[2 marks]Name the hydrocarbon with the formula C4H10 and state if it is an alkane or an alkene.
(c)[2 marks]The hydrocarbon C3H6 can be drawn as a straight chain with a double bond. Write its name and draw its displayed formula.
(d)[2 marks]Explain the main difference between alkanes and alkenes in terms of their bonding.
Question 313
7 marks · Easy
Answer and see the solution →Answer the questions about the structure and naming of unbranched alkanes and the C=C bond in alkenes.
(a)[2 marks]Draw the displayed formula of pentane (an unbranched alkane with five carbons) and give its name.
(b)[2 marks]Draw the structure of ethene and label the double bond.
(c)[2 marks]Explain why ethene is classified as unsaturated.
(d)[1 mark]State the type of bond found only in alkenes but not in alkanes.
Question 314
7 marks · Easy
Answer and see the solution →Answer all parts about reactions of hydrocarbons with halogens. You may use displayed formulae or structural formulae where needed.
(a)[2 marks]Write a balanced chemical equation for the reaction between ethane and chlorine, naming the type of reaction.
(b)[3 marks]Draw and name the two possible mono-bromo isomers formed when propane reacts with bromine under UV light.
(c)[2 marks]But-2-ene (C4H8) can also react with bromine. Draw the structure of one product formed, and name the type of reaction.
Question 315
7 marks · Easy
Answer and see the solution →Answer all parts about the formulas and physical properties of alkanes and alkenes.
(a)[2 marks]State the general formula for alkanes and for alkenes.
(b)[2 marks]Explain what is meant by a homologous series.
(c)[3 marks]For an alkene and an alkane both with four carbon atoms, compare their physical state at room temperature and explain any similarities or differences.
Question 316
7 marks · Easy
Answer and see the solution →This question is about esterification and addition polymers. Read the question carefully and answer all parts.
(a)[2 marks]Draw the structural formula of the ester formed when methanol reacts with propanoic acid.
(b)[1 mark]State the type of reaction that occurs during ester formation.
(c)[2 marks]Draw the displayed formula for the repeat unit of poly(propene).
(d)[2 marks]Explain briefly why addition polymers like poly(propene) are described as non-biodegradable.
Question 317
7 marks · Easy
Answer and see the solution →The compound propyl ethanoate is formed by the reaction of an alcohol with a carboxylic acid.
(a)[2 marks]Draw the displayed formula of propyl ethanoate.
(b)[1 mark]Name the alcohol and carboxylic acid you would react to make propyl ethanoate.
(c)[2 marks]The polymer poly(propene) is used for making ropes and crates. Below is a section of the polymer chain:
Draw the structure of the monomer that is used to make poly(propene).
(d)[2 marks]Deduce the number of carbon atoms in the repeat unit of poly(propene) and explain your reasoning.