Simple molecules and covalent bonds — Paper 1 · IGCSE Chemistry (9-1) 0971

6 A covalent molecule Q contains exactly six shared electrons. What is Q? A ammonia, NH3 B chlorine, Cl 2 C methane, CH4 D water, H2O

1 marks

Answer: A

This question in 0971/11 May/June 2018

7 Which row describes the formation of single covalent bonds in methane? A atoms share a pair of electrons both atoms gain a noble gas electronic structure B atoms share a pair of electrons both atoms have the same number of electrons in their outer shell C electrons are transferred from one both atoms gain a atom to another noble gas electronic structure D electrons are transferred from one both atoms have the same number atom to another of electrons in their outer shell

1 marks

Answer: A

This question in 0971/11 May/June 2019

5 What is the total number of electrons in one molecule of ammonia, NH3? A 6 B 8 C 10 D 11

1 marks

Answer: C

This question in 0971/12 Oct/Nov 2019

6 The electronic structures of two atoms, P and Q, are shown. P Q P and Q combine together to form a compound. What is the type of bonding in the compound and what is the formula of the compound? type of bonding formula A ionic PQ B ionic PQ2 C covalent PQ2 D covalent PQ

1 marks

Answer: A

This question in 0971/11 May/June 2020

6 The electronic structures of two atoms, P and Q, are shown. P Q P and Q combine together to form a compound. What is the type of bonding in the compound and what is the formula of the compound? type of bonding formula A ionic PQ B ionic PQ2 C covalent PQ2 D covalent PQ

1 marks

Answer: A

This question in 0971/12 May/June 2020

8 The structure of propane, C3H8, is shown. H H H H C C C H H H H How many electrons are involved in the bonding of propane? A 8 B 10 C 16 D 20

1 marks

Answer: D

This question in 0971/12 Oct/Nov 2020

5 A covalent molecule Q contains only six shared electrons. What is Q? A ammonia, NH3 B chlorine, Cl 2 C methane, CH4 D water, H2O

1 marks

Answer: A

This question in 0971/11 May/June 2021

7 Which dot-and-cross diagram shows the arrangement of outer shell electrons in a molecule of hydrogen chloride? A B C D H Cl H Cl H Cl H Cl

1 marks

Answer: A

This question in 0971/12 May/June 2022

6 Which statement about compounds is correct? A Covalent compounds are less volatile than ionic compounds. B Covalent compounds conduct electricity when they are solid. C Ionic compounds conduct electricity when molten. D Ionic compounds are insoluble in water.

1 marks

Answer: C

This question in 0971/12 Oct/Nov 2022

37 What is the total number of shared electrons in ethane, C2H6? A 6 B 7 C 12 D 14

1 marks

Answer: D

This question in 0971/12 Oct/Nov 2022

6 Which row describes the formation of single covalent bonds in methane? A atoms share a pair of electrons both atoms gain a noble gas electronic structure B atoms share a pair of electrons both atoms have the same number of electrons in their outer shell C electrons are transferred from one both atoms gain a atom to another noble gas electronic structure D electrons are transferred from one both atoms have the same number atom to another of electrons in their outer shell

1 marks

Answer: A

This question in 0971/11 May/June 2023

5 Ammonia, NH3, is a covalent molecule. Which diagram shows the outer-shell electron arrangement in a molecule of ammonia? A B H N H H N H H H C D H N H H N H H H

1 marks

Answer: C

This question in 0971/12 May/June 2023

6 Which row describes the properties of a simple molecular substance? electrical boiling point conductivity when solid A low poor B high poor C low good D high good

1 marks

Answer: A

This question in 0971/12 Oct/Nov 2023

6 A covalent molecule, M, contains four shared pairs of electrons. What is M? A ammonia, NH3 B hydrogen chloride, HCl C methane, CH4 D water, H2O

1 marks

Answer: C

This question in 0971/11 May/June 2024

8 Which statement about bonding is correct? A All the atoms in CH4, NH3 and H2O molecules have noble gas electronic configurations. B Calcium chloride is a covalent molecule. C Group I metals gain electrons when they bond with Group VII elements. D Oxide ions in calcium oxide are positively charged.

1 marks

Answer: A

This question in 0971/12 May/June 2024

7 Covalent bonds are formed when electrons are … 1 … . Most covalent compounds have … 2 … electrical conductivity. Which words correctly complete gaps 1 and 2? 1 2 A shared high B shared low C transferred high D transferred low

1 marks

Answer: B

This question in 0971/12 Oct/Nov 2024

7 Which substances contain one or more shared pairs of electrons? 1 argon 2 methane 3 iron(III) oxide 4 chlorine A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

1 marks

Answer: D

This question in 0971/11 May/June 2025

8 In the molecules CH4, HCl and H2O, which atoms use all of their outer shell electrons in bonding? A C and Cl B C and H C Cl and H D H and O

1 marks

Answer: B

This question in 0971/12 May/June 2025

8 Which properties are typical of simple molecules? 1 high melting point 2 good electrical conductivity 3 low boiling point 4 high malleability A 1 and 2 B 2 and 4 C 3 and 4 D 3 only

1 marks

Answer: D

This question in 0971/12 Oct/Nov 2025