Oxides — Paper 1 · IGCSE Chemistry (9-1) 0971

16 Which statement about oxides is correct? A A solution of magnesium oxide has a pH less than pH 7. B A solution of sulfur dioxide has a pH greater than pH 7. C Magnesium oxide reacts with nitric acid to make a salt. D Sulfur dioxide reacts with hydrochloric acid to make a salt.

1 marks

Answer: C

This question in 0971/11 May/June 2018

32 Which statement about sulfur and its compounds is not correct? A Sulfur dioxide is used as a food preservative. B Sulfur dioxide turns acidified aqueous potassium manganate(VII) from purple to colourless. C Sulfur forms a basic oxide. D Sulfur is used in the manufacture of sulfuric acid.

1 marks

Answer: C

This question in 0971/11 May/June 2018

17 The positions of elements W, X, Y and Z in the Periodic Table are shown. W Y X Z Which elements form basic oxides? A W, X and Y B W and X only C Y only D Z only

1 marks

Answer: A

This question in 0971/11 May/June 2019

33 The diagram represents a lime kiln used to heat limestone to a very high temperature. waste gases lime kiln limestone fuel in fuel in air in air in X What leaves the kiln at X? A calcium carbonate B calcium hydroxide C calcium oxide D calcium sulfate

1 marks

Answer: C

This question in 0971/11 May/June 2019

18 Which element forms an acidic oxide? A calcium B lithium C magnesium D sulfur

1 marks

Answer: D

This question in 0971/12 Oct/Nov 2019

24 Some properties of substance X are listed. ● It conducts electricity when molten. ● It has a high melting point. ● It burns in oxygen and the oxide dissolves in water to give a solution with pH 11. What is X? A a covalent compound B a macromolecule C a metal D an ionic compound

1 marks

Answer: C

This question in 0971/12 Oct/Nov 2019

34 Which statement about limestone and lime is correct? A Limestone combines with water to produce slaked lime. B Lime is obtained from limestone by oxidation. C Lime is used in the desulfurisation of flue gases. D Lime is used in the treatment of alkaline soil.

1 marks

Answer: C

This question in 0971/12 Oct/Nov 2019

17 Phosphorus is an element in Group V of the Periodic Table. It burns in air to form an oxide, which dissolves in water to form a solution with a pH of 1. Which row describes this oxide of phosphorus? metal non-metal acidic basic oxide oxide oxide oxide A v x Jv x B J x x Jv Cc x J Jv x D x Jv x JV

1 marks

Answer: C

This question in 0971/11 May/June 2020

17 Element G is a metal in Group I of the Periodic Table and element H is a non-metal in Group VII. Both of these elements form oxides. Which statement about their oxides is correct? A Both oxides are acidic. B Both oxides are basic. C The oxide of G is acidic and the oxide of H is basic. D The oxide of H is acidic and the oxide of G is basic.

1 marks

Answer: D

This question in 0971/12 May/June 2020

22 Which compound is an acidic oxide? A aluminium oxide B carbon dioxide C copper(II) oxide D magnesium oxide

1 marks

Answer: B

This question in 0971/12 Oct/Nov 2020

18 Element X forms an oxide, XO, that neutralises sulfuric acid. Which row describes X and XO? element X nature of oxide, XO A metal acidic B metal basic C non-metal acidic D non-metal basic

1 marks

Answer: B

This question in 0971/11 May/June 2021

18 Oxide 1 is a solid that reacts with dilute hydrochloric acid. Oxide 2 is a gas that reacts with sodium hydroxide solution. What are the formulae of the oxides? oxide 1 oxide 2 A CaO MgO B MgO NO2 C NO2 SO2 D SO2 CaO

1 marks

Answer: B

This question in 0971/12 Oct/Nov 2021

18 The oxides of two elements, X and Y, are separately dissolved in water and the pH of each solution tested. oxide tested pH of solution X 1 Y 13 Which information about X and Y is correct? oxide is oxide is metal non-metal acidic basic A X Y X Y B X Y Y X C Y X X Y D Y X Y X

1 marks

Answer: B

This question in 0971/11 May/June 2022

26 Which statements about the general properties of metals are correct? 1 They are good conductors of heat and electricity. 2 They have low melting points. 3 They react with dilute acids to form a salt and water. 4 They react with oxygen to form basic oxides. A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: B

This question in 0971/11 May/June 2022

34 What are the products when limestone (calcium carbonate) is heated strongly? A calcium hydroxide and carbon dioxide B calcium hydroxide and carbon monoxide C calcium oxide and carbon dioxide D calcium oxide and carbon monoxide

1 marks

Answer: C

This question in 0971/11 May/June 2022

18 The oxides of two elements, X and Y, are separately dissolved in water and the pH of each solution tested. oxide tested pH of solution X 1 Y 13 Which information about X and Y is correct? oxide is oxide is metal non-metal acidic basic A X Y X Y B X Y Y X C Y X X Y D Y X Y X

1 marks

Answer: B

This question in 0971/12 May/June 2022

34 What are the products when limestone (calcium carbonate) is heated strongly? A calcium hydroxide and carbon dioxide B calcium hydroxide and carbon monoxide C calcium oxide and carbon dioxide D calcium oxide and carbon monoxide

1 marks

Answer: C

This question in 0971/12 May/June 2022

17 X and Y are oxides of two different elements. ● X reacts with water to produce aqueous solution Z. ● Z turns universal indicator paper blue. ● An aqueous solution of Y reacts with sodium carbonate to produce carbon dioxide gas. Which statement is correct? A X and Y are both the oxides of metals. B X and Y are both the oxides of non-metals. C X is the oxide of a metal and Y is the oxide of a non-metal. D X is the oxide of a non-metal and Y is the oxide of a metal.

1 marks

Answer: C

This question in 0971/12 Oct/Nov 2022

33 Which substance gives off carbon dioxide on heating? A lime B limestone C limewater D slaked lime

1 marks

Answer: B

This question in 0971/12 Oct/Nov 2022

16 Which row identifies an acidic oxide and a basic oxide? acidic oxide basic oxide A CaO CuO B CaO SO2 C CO2 CuO D CO2 SO2

1 marks

Answer: C

This question in 0971/11 May/June 2023

16 Rubidium is in Group I and strontium is in Group II of the Periodic Table. Which row describes the nature of rubidium oxide, Rb2O, and strontium oxide, SrO? Rb2O SrO A acidic acidic B acidic basic C basic acidic D basic basic

1 marks

Answer: D

This question in 0971/12 May/June 2023

19 Which element forms an oxide that reacts with an aqueous solution of a base? A argon B sulfur C magnesium D copper

1 marks

Answer: B

This question in 0971/12 Oct/Nov 2023

19 Which statement about sodium oxide or nitrogen dioxide is correct? A Nitrogen dioxide is a solid at room temperature. B Nitrogen dioxide is acidic. C Sodium oxide has a lower melting point than nitrogen dioxide. D Sodium oxide is covalently bonded.

1 marks

Answer: B

This question in 0971/11 May/June 2024

21 Which statement about sulfur dioxide or calcium oxide is correct? A Calcium oxide is an acid. B Calcium oxide turns thymolphthalein yellow. C Sulfur dioxide is a base. D Sulfur dioxide turns thymolphthalein colourless.

1 marks

Answer: D

This question in 0971/12 May/June 2024

20 Compound M contains calcium. Two reactions of M are listed. ● M reacts with dilute hydrochloric acid to form a salt and water only. ● M reacts with aqueous ammonium chloride to form a gas that turns damp red litmus paper blue. What is M? A CaOH B Ca(OH)2 C CaCO3 D Ca(CO3)2

1 marks

Answer: B

This question in 0971/12 Oct/Nov 2024

21 The diagram shows one period of the Periodic Table. Li Be B C N O F Ne Which two elements form acidic oxides? A beryllium and lithium B carbon and neon C carbon and nitrogen D nitrogen and neon

1 marks

Answer: C

This question in 0971/12 Oct/Nov 2024

20 Which parts of the Periodic Table contain elements that only form basic oxides? A Group I and Period 3 B Group I only C Group VIII and Period 3 D Group VIII only

1 marks

Answer: B

This question in 0971/12 May/June 2025

27 Substance G reacts with: ● dilute acids to produce hydrogen ● steam to produce a basic oxide ● oxygen to produce a basic oxide. What is substance G? A magnesium B phosphorus C silicon D silver

1 marks

Answer: A

This question in 0971/12 Oct/Nov 2025