Simple molecules and covalent bonds — Paper 1 · IGCSE Sciences - Co-ordinated (9-1) 0973

16 Which row describes the volatility and electrical conductivity of liquid covalent compounds? electrical volatility conductivity A high high B high low C low high D low low

1 marks

Answer: B

This question in 0973/11 May/June 2020

14 Which statement about atoms and molecules is correct? A All molecules are gases at room temperature and pressure. B An atom is the smallest part of an element. C Atoms of the same element all have the same mass. D Molecules always contain atoms of more than one element.

1 marks

Answer: B

This question in 0973/12 May/June 2020

16 What is a property of a typical covalent compound? A electrical insulator B high melting point C low volatility D soluble in water

1 marks

Answer: A

This question in 0973/12 May/June 2020

16 Which row describes a covalent compound? solubility volatility in water A high low B high high C low low D low high

1 marks

Answer: D

This question in 0973/11 Oct/Nov 2020

26 Methane is a covalent compound. Which statement about methane is correct? A It conducts electricity. B It is a gas at room temperature. C It is an unsaturated hydrocarbon. D It is formed from a metal and a non-metal.

1 marks

Answer: B

This question in 0973/11 Oct/Nov 2020

16 Which statement about a carbon dioxide molecule is correct? A It is composed of metallic elements, which are covalently bonded. B It is composed of metallic elements, which are ionically bonded. C It is composed of non-metallic elements, which are covalently bonded. D It is composed of non-metallic elements, which are ionically bonded.

1 marks

Answer: C

This question in 0973/11 May/June 2021

16 Which statement about a carbon dioxide molecule is correct? A It is composed of metallic elements, which are covalently bonded. B It is composed of metallic elements, which are ionically bonded. C It is composed of non-metallic elements, which are covalently bonded. D It is composed of non-metallic elements, which are ionically bonded.

1 marks

Answer: C

This question in 0973/12 May/June 2021

16 A model of a molecule is shown. key hydrogen atom boron atom Which row shows the formula of this molecule and describes the type of bonding between the atoms? formula bonding A 2BH3 covalent B 2BH3 ionic C B2H6 covalent D B2H6 ionic

1 marks

Answer: C

This question in 0973/11 Oct/Nov 2021

17 The diagram shows the electrolysis of dilute sulfuric acid using inert electrodes. + – dilute sulfuric acid Which row shows the products formed at each electrode and describes the bonding in sulfuric acid? type of anode cathode bonding A oxygen hydrogen ionic B oxygen hydrogen covalent C hydrogen oxygen ionic D hydrogen oxygen covalent

1 marks

Answer: A

This question in 0973/12 May/June 2022

17 Hydrogen peroxide is a compound. A molecule of hydrogen peroxide can be represented as shown. key = oxygen atom = hydrogen atom What is the formula of hydrogen peroxide? A HO B H2O2 C H2O D 2OH

1 marks

Answer: B

This question in 0973/11 May/June 2024

15 Which substances exist as covalent molecules? 1 helium 2 chlorine 3 sodium chloride 4 ethanol A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

1 marks

Answer: C

This question in 0973/12 May/June 2024

16 What is the dot-and-cross diagram for a water molecule? A B C D O O O O H H H H H H H H

1 marks

Answer: A

This question in 0973/11 Oct/Nov 2024

17 The electronic structures of carbon and of hydrogen are shown. C H What is the formula of a compound formed between carbon and hydrogen? A CH2 B CH3 C C4H D CH4

1 marks

Answer: D

This question in 0973/11 Oct/Nov 2024

18 In which molecule are all the outer-shell electrons of the atoms used to form the covalent bonds? A HCl B H2O C NH3 D CH4

1 marks

Answer: D

This question in 0973/11 May/June 2025

17 Part of the Periodic Table is shown. W X Y Z Which elements form a bond by sharing electrons? A W and X B W and Y C X and Y D Y and Z

1 marks

Answer: C

This question in 0973/11 Oct/Nov 2025