Alkenes — Paper 2 · IGCSE Sciences - Co-ordinated (9-1) 0973

26 Three reactions are listed. 1 the addition of hydrogen to ethene 2 the addition of steam to ethene 3 the cracking of long chain alkanes Which reactions produce molecules of a different homologous series from the reactant molecules? A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

1 marks

Answer: D

This question in 0973/21 May/June 2019

27 Compound X is the monomer in an addition polymerisation reaction. Which statement describes a molecule of X? A It has an acidic end and basic end. B It has two acidic ends. C It is a long chain molecule with a high molecular mass. D It is an alkene.

1 marks

Answer: D

This question in 0973/22 May/June 2019

27 Which row matches the name of a polymer to the formula of the monomer from which it is made? polymer monomer A poly(ethene) C2H2 B poly(ethene) C2H6 C poly(propene) C2H4 D poly(propene) C3H6

1 marks

Answer: D

This question in 0973/21 May/June 2020

27 Which row describes properties of alkenes? products of structure of molecules complete combustion A contain only carbon and hydrogen CO2 and H2O B contain only carbon and hydrogen CO and H2O C contain only single bonds CO and H2O D contain only single bonds CO2 and H2O

1 marks

Answer: A

This question in 0973/22 May/June 2020

26 What reacts with ethene to form ethanol? A bromine B hydrogen C oxygen D steam

1 marks

Answer: D

This question in 0973/21 Oct/Nov 2020

27 Reactants for three chemical processes are listed. 1 ethene + steam 2 ethene + hydrogen 3 ethene in addition polymerisation Which processes form saturated hydrocarbons? A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

1 marks

Answer: C

This question in 0973/22 May/June 2021

26 Which row describes the hydrocarbon CH3CHCH2? homologous series general formula A alkane CnH2n+2 B alkane CnH2n C alkene CnH2n+2 D alkene CnH2n

1 marks

Answer: D

This question in 0973/22 May/June 2022

27 The structure of the monomer chloroethene is shown. H H C C H Cl What is the structure of the polymer formed from this monomer? A B H H H H H H H H C C C C C C C C H H H H n H Cl H Cl n C D H H H H Cl H Cl H C C C C C C C C H Cl H Cl n H Cl H Cl n

1 marks

Answer: B

This question in 0973/21 Oct/Nov 2022

26 The structure of a molecule of compound X is shown. H H C C H H Which two formulas represent compounds that are in the same homologous series as X? A C5H10 and C5H12 B C4H10 and C6H14 C C3H6 and C5H10 D C3H6 and C4H10

1 marks

Answer: C

This question in 0973/21 May/June 2024

26 What is a general formula for unsaturated hydrocarbons? A CnHn+2 B C2nH2n+2 C CnH2n D CnH2n+2

1 marks

Answer: C

This question in 0973/21 Oct/Nov 2024

24 Which statements about the addition reactions of ethene are correct? 1 Ethene reacts with hydrogen to form ethane. 2 Ethene reacts with steam to form ethane. 3 Ethene undergoes addition reactions because it is a saturated hydrocarbon. 4 During addition reactions of ethene, only one product is produced. A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: B

This question in 0973/21 Oct/Nov 2025

25 A section of polymer X is shown. CH3 H C C H CH3 n Which statement about X is correct? A It is a condensation polymer made from but-1-ene. B It is an addition polymer made from but-1-ene. C It is a condensation polymer made from but-2-ene. D It is an addition polymer made from but-2-ene.

1 marks

Answer: D

This question in 0973/21 Oct/Nov 2025