Alcohols — Paper 2 · IGCSE Sciences - Co-ordinated (Double) 0654

26 What are the products of the complete combustion of ethanol? A carbon dioxide + carbon monoxide + water B carbon dioxide + hydrogen C carbon dioxide + water D carbon monoxide + water

1 marks

Answer: C

This question in 0654/21 Oct/Nov 2017

27 Which process is used to make ethanol? A Addition of oxygen to ethene in the presence of a catalyst. B Addition of oxygen to ethene with no catalyst. C Addition of steam to ethene in the presence of a catalyst. D Addition of steam to ethene with no catalyst.

1 marks

Answer: C

This question in 0654/23 Oct/Nov 2017

26 Ethene is manufactured from alkanes. Ethene is used to manufacture ethanol. Which statement about these processes is not correct? A Ethanol is made by reacting ethene with oxygen. B Ethene is converted to ethanol by an addition reaction. C Ethene is made by cracking. D The manufacture of ethanol uses a catalyst.

1 marks

Answer: A

This question in 0654/23 Oct/Nov 2018

26 Which structure represents ethanol? A B C D H H H H H H H H C H H C C H C C H C C O H H H H H H H H

1 marks

Answer: D

This question in 0654/23 Oct/Nov 2019

24 The reaction equation for the production of ethanol by an addition reaction is shown. C2H4 + H2O → C2H5OH Which row describes the physical state of water and of ethanol in the reaction vessel? water ethanol A gas gas B gas liquid C liquid gas D liquid liquid

1 marks

Answer: A

This question in 0654/23 May/June 2020

26 Ethanol is formed by fermentation and by the addition of steam to ethene. What is used to catalyse these reactions? fermentation addition of steam A glucose nickel B yeast nickel C glucose phosphoric acid D yeast phosphoric acid

1 marks

Answer: D

This question in 0654/22 Oct/Nov 2020

26 What reacts with ethene to make ethanol? A bromine B hydrogen C steam D yeast

1 marks

Answer: C

This question in 0654/23 Oct/Nov 2020

27 Ethanol is manufactured by reacting ethene with steam in the presence of a catalyst. Which type of reaction occurs? A addition B oxidation C polymerisation D reduction

1 marks

Answer: A

This question in 0654/22 Feb/March 2021

26 Four molecules are shown. Which structure represents ethanol? A B C D H H H H H H H H H H C C OH H C C C OH C C H C C H H H H H H H OH H H

1 marks

Answer: A

This question in 0654/21 Oct/Nov 2021

27 Four molecules are shown. Which structure represents ethanol? A B C D H H H H H H H H H H C C OH H C C C OH C C H C C H H H H H H H OH H H

1 marks

Answer: A

This question in 0654/22 Oct/Nov 2021

27 Four molecules are shown. Which structure represents ethanol? A B C D H H H H H H H H H H C C OH H C C C OH C C H C C H H H H H H H OH H H

1 marks

Answer: A

This question in 0654/23 Oct/Nov 2021

27 The flow chart shows some chemical substances and processes. glucose solution and yeast carbon fermentation dioxide compound X process Y water Which row identifies compound X and process Y? compound X process Y A ethanol combustion B ethanol cracking C ethene combustion D ethene cracking

1 marks

Answer: A

This question in 0654/22 Feb/March 2022

27 During fermentation, an organic liquid and a colourless gas are produced. Which row identifies a use for the liquid and describes the result of a test on the colourless gas? use for the liquid gas test result A monomer in addition polymerisation reactions turns limewater milky B monomer in addition polymerisation reactions relights glowing splint C solvent turns limewater milky D solvent relights glowing splint

1 marks

Answer: C

This question in 0654/22 Feb/March 2023

26 The structure of compound P is shown. H H H H H C C C C O H H H H H Which type of compound is P? A polymer B alcohol C alkane D alkene

1 marks

Answer: B

This question in 0654/21 May/June 2025