Chemistry 0620 · IGCSE
Oxides
100 practice questions on Oxides, with worked solutions and instant marking.
Which oxide shows amphoteric properties?
Feb/March 2016
Which of the following statements about sulfur dioxide are correct?
Feb/March 2017
Beryllium oxide reacts with sulfuric acid and with aqueous sodium hydroxide. What kind of oxide is beryllium oxide?
Feb/March 2017
Carbon, copper, magnesium, sodium and sulfur are each able to form oxides. How many of these elements produce acidic oxides?
Feb/March 2018
Sulfur can be burned to form sulfur dioxide. Which row gives a source of sulfur and a use of sulfur dioxide?
Feb/March 2018
Carbon, copper, magnesium, sodium and sulfur are all able to make oxides. How many of these elements make acidic oxides?
Feb/March 2018
Data on the solubility of four oxides in water is given. Which oxide, after being added to water, produces a solution with a pH less than $7$?
Feb/March 2019
Which element has an oxide that is used as a food preservative?
Feb/March 2019
Which statement gives a chemical property of aluminium oxide, $\text{Al}_2\text{O}_3$?
Feb/March 2019
Three elements, X, Y and Z, are burnt in oxygen. The oxides that form are dissolved in water and the pH of the resulting solutions is measured. Which of the following statements are correct?
Feb/March 2020
For what reason is sulfur dioxide used as a food preservative?
Feb/March 2020
X, Y and Z are oxides of elements in the same period of the Periodic Table. Some details about each oxide are given. Which type of oxide is X, which type is Y and which type is Z?
Feb/March 2020
A section of the Periodic Table is shown. Which element produces an acidic oxide?
Feb/March 2021
Which substance is produced when calcium carbonate undergoes thermal decomposition?
Feb/March 2021
Which row shows the reactions of magnesium hydroxide and magnesium oxide?
Feb/March 2021
Petrol is burned inside a car engine, creating waste gases that escape from the vehicle's exhaust. One of these waste gases is an oxide of nitrogen. Which statement explains how this oxide of nitrogen is produced?
Feb/March 2021
In industrial plants, calcium oxide, CaO, and calcium hydroxide, Ca(OH)$_2$, are both employed to remove sulfur dioxide, SO$_2$, from flue gases. Which row gives the correct classification of calcium oxide, calcium hydroxide and sulfur dioxide?
Feb/March 2023
This question concerns compounds containing nitrogen.
Feb/March 2023
Which row shows the changes that happen when metals burn in oxygen?
Feb/March 2024
Which element produces an acidic oxide?
Feb/March 2024
Which of these elements produce an oxide that, when it reacts with water, gives a blue solution with thymolphthalein? 1 calcium 2 carbon 3 sulfur
Feb/March 2025
Element E is a metal in Group I of the Periodic Table, whereas element G is a non-metal in Group VII. Both elements can form oxides. Which statement about these oxides is correct?
Feb/March 2025
A section of the Periodic Table is shown. Which element produces an acidic oxide?
May/June 2016
A section of the Periodic Table is displayed. Which element gives an acidic oxide?
May/June 2016
A section of the Periodic Table is shown. Which element produces an acidic oxide?
May/June 2016
Which row shows whether an amphoteric oxide reacts with acids and with bases?
May/June 2016
Which row states whether an amphoteric oxide reacts with acids and bases?
May/June 2016
Which row states whether an amphoteric oxide reacts with acids and bases?
May/June 2016
Sulfuric acid is made by the Contact process. The stages of the Contact process are shown. starting material → step 1 sulfur dioxide → step 2 sulfur trioxide → step 3 oleum → step 4 sulfuric acid
May/June 2016
Which oxide dissolves in water to produce an alkaline solution?
May/June 2017
Which oxide is suitable for neutralising acidic soil?
May/June 2017
Several statements on how calcium oxide is made and what it is used for are given. Which of the statements are correct?
May/June 2017
Zinc oxide is amphoteric. Which row shows the reactions of zinc oxide?
May/June 2017
What type of oxide does aluminium oxide belong to?
May/June 2017
Statements on calcium oxide production methods and uses are shown. Which of these statements are correct?
May/June 2017
Which oxide exhibits amphoteric behaviour?
May/June 2017
A list of oxides of several elements is given. CO CO$_2$ Na$_2$O MgO Al$_2$O$_3$ SiO$_2$ P$_4$O$_{10}$ SO$_2$ Cl$_2$O$_7$ Cr$_2$O$_3$
May/June 2017
Which statement concerning oxides is correct?
May/June 2018
Which of the following statements about oxides is correct?
May/June 2018
Which of these statements about oxides is correct?
May/June 2018
Element Z produces the oxide, $\text{ZO}_2$. Three uses of $\text{ZO}_2$ are given: a bleaching agent; killing bacteria; the manufacture of an important acid. Which element is Z?
May/June 2018
Which of the following statements about oxides is correct?
May/June 2018
Which statement concerning sulfur and its compounds is incorrect?
May/June 2018
Which of the following statements about oxides is correct?
May/June 2018
Which row gives the uses of sulfur and sulfur dioxide?
May/June 2018
Which one of the statements about oxides is correct?
May/June 2018
Element Z forms an oxide, $ZO_2$. Three applications of $ZO_2$ are given below. • used as a bleaching agent • used to kill bacteria • used in the manufacture of an important acid What element is Z?
May/June 2018
The placements of elements W, X, Y and Z in the Periodic Table are shown. Which of these elements produce basic oxides?
May/June 2019
The positions of elements W, X, Y and Z in the Periodic Table are shown. Which of these elements form basic oxides?
May/June 2019
Shown are the positions of elements W, X, Y and Z in the Periodic Table. Which of these elements form basic oxides?
May/June 2019
Nitrogen(I) oxide, $\text{N}_2\text{O}$, nitrogen(II) oxide, $\text{NO}$, and carbon monoxide, $\text{CO}$, are all non-metal oxides. They do not react with acids or bases. Which statement is correct?
May/June 2019
The locations of elements W, X, Y and Z in the Periodic Table are shown. Which of these elements form basic oxides?
May/June 2019
To which category of oxide do carbon monoxide and aluminium oxide belong?
May/June 2019
The placements of elements W, X, Y and Z in the Periodic Table are shown. Which of these elements form basic oxides?
May/June 2019
The diagram shows a lime kiln that is used to heat limestone to a very high temperature. What comes out of the kiln at X?
May/June 2019
Which of the following statements concerning carbon monoxide and aluminium oxide is correct?
May/June 2019
The locations of elements W, X, Y and Z in the Periodic Table are shown. Which elements produce basic oxides?
May/June 2019
Which table row shows the uses of sulfur and sulfur dioxide?
May/June 2021
Element X forms an oxide, XO, which neutralises sulfuric acid. Which row gives the description of X and XO?
May/June 2021
Which row gives the uses of sulfur and sulfur dioxide?
May/June 2021
The equations show two reactions, P and Q, involving lime (calcium oxide). P: $\text{CaO} + \text{SiO}_2 \rightarrow \text{CaSiO}_3$ Q: $\text{CaO} + \text{SO}_2 \rightarrow \text{CaSO}_3$ During which processes do these reactions take place?
May/June 2021
Element X produces an oxide, XO, which neutralises sulfuric acid. Which row correctly identifies X and XO?
May/June 2021
Element X makes an oxide, XO, which neutralises sulfuric acid. Which row gives the correct description of X and XO?
May/June 2021
Some reactions involving element M are illustrated. Element M is combusted to produce the oxide of M. Water is then added, forming a solution. When blue litmus is added, it becomes red. When the oxide of M is added to purple acidified potassium manganate(VII), the solution is decolourised. What is element M?
May/June 2021
Element X produces an oxide, XO, which neutralises sulfuric acid. Which row identifies X and XO?
May/June 2021
The equations show two reactions, P and Q, involving lime (calcium oxide). $\text{P:}\; \text{CaO} + \text{SiO}_2 \rightarrow \text{CaSiO}_3$ $\text{Q:}\; \text{CaO} + \text{SO}_2 \rightarrow \text{CaSO}_3$ In which processes do these reactions take place?
May/June 2021
Element X produces an oxide, XO, which neutralises sulfuric acid. Which row correctly identifies X and XO?
May/June 2021
The oxides of two elements, X and Y, are each dissolved separately in water, and the pH of both solutions is then measured. The results are: X has pH $1$ and Y has pH $13$. Which statement about X and Y is correct?
May/June 2022
Which of the following statements about sulfur dioxide are correct?
May/June 2022
The oxides of two elements, X and Y, are each dissolved separately in water, and the pH of both solutions is then measured. X has pH 1 and Y has pH 13. Which statement about X and Y is correct?
May/June 2022
Which property of sulfur dioxide accounts for its use as a food preservative?
May/June 2022
The oxides of two elements, X and Y, are dissolved separately in water, and the pH of each solution is then tested. oxide X: pH $= 1$ oxide Y: pH $= 13$ Which statement about X and Y is correct?
May/June 2022
The oxides of two elements, X and Y, are each added separately to water, and the pH of every solution is measured. X gives a pH of 1 and Y gives a pH of 13. Which statement about X and Y is correct?
May/June 2022
The oxides of two elements, X and Y, are each added separately to water, and the pH of both solutions is measured. oxide tested X: $\text{pH} = 1$ oxide tested Y: $\text{pH} = 13$ Which statement about X and Y is correct?
May/June 2022
The oxides of two elements, X and Y, are each put into water separately, and the pH of the resulting solution is measured. oxide tested X has pH 1; oxide tested Y has pH 13. Which statement about X and Y is correct?
May/June 2022
This question concerns Group VI elements and the compounds they form.
May/June 2022
Which row correctly identifies an acidic oxide and a basic oxide?
May/June 2023
Rubidium belongs to Group I, whereas strontium belongs to Group II in the Periodic Table. Which row gives the nature of rubidium oxide, $\text{Rb}_2\text{O}$, and strontium oxide, $\text{SrO}$?
May/June 2023
Details about four oxides, J, K, L and M, are given. J gives off ammonia when it is added to aqueous ammonium chloride. K reacts with aqueous sodium hydroxide. L is the oxide of an element in Group I. M is an oxide of an element from the top-right part of the Periodic Table. Which row is the correct one?
May/June 2023
Element X reacts with air to produce an acidic gas that turns potassium manganate(VII) colourless. Identify X.
May/June 2023
Which oxide is regarded as an amphoteric oxide?
May/June 2023
Which statement concerning amphoteric oxides is correct?
May/June 2023
Which oxide demonstrates amphoteric behaviour?
May/June 2023
Element X reacts with oxygen in air to produce an acidic gas that removes the colour from potassium manganate(VII). What is X?
May/June 2023
A set of oxides, A to H, is given below. A calcium oxide B aluminium oxide C silicon(IV) oxide D sulfur dioxide E carbon dioxide F iron(III) oxide G silver oxide H carbon monoxide Answer the questions that follow about oxides A to H. Each letter may be used once, more than once or not used at all.
May/June 2023
Which statement concerning sodium oxide or nitrogen dioxide is correct?
May/June 2024
Which of the following statements about sulfur dioxide or calcium oxide is correct?
May/June 2024
Universal indicator is added to an aqueous solution of oxide $X$. The indicator undergoes a colour change from green to red. What is $X$?
May/June 2024
Four statements are given about how oxides react with dilute hydrochloric acid and with aqueous sodium hydroxide. Which of the statements are correct?
May/June 2024
Which regions of the Periodic Table include elements that form only basic oxides?
May/June 2025
Which compound should be classified as an acidic oxide?
May/June 2025
Which three oxides are all classed as acidic?
May/June 2025
Which of the following statements about carbon dioxide are correct?
May/June 2025
Which row correctly shows an acidic oxide, a basic oxide and an amphoteric oxide?
May/June 2025
A section of the Periodic Table is shown. Which element forms an acidic oxide?
Oct/Nov 2016
A section of the Periodic Table is shown. What type of oxides are formed by X and Y?
Oct/Nov 2016
Germanium oxide appears as a white powder. Germanium oxide reacts with concentrated hydrochloric acid. Germanium oxide also reacts with concentrated aqueous sodium hydroxide. Germanium oxide does not dissolve when it is put into water. What kind of oxide is germanium oxide?
Oct/Nov 2016
Germanium oxide appears as a white powder. Concentrated hydrochloric acid reacts with germanium oxide. Concentrated aqueous sodium hydroxide also reacts with germanium oxide. Germanium oxide does not dissolve in water. Which type of oxide is germanium oxide?
Oct/Nov 2016
Germanium oxide appears as a white powder. Germanium oxide reacts with concentrated hydrochloric acid. Germanium oxide reacts with concentrated aqueous sodium hydroxide. Germanium oxide does not dissolve when it is added to water. Which type of oxide is germanium oxide?
Oct/Nov 2016
Magnesium, phosphorus and chlorine are elements in one period of the Periodic Table. Which row identifies the type of oxide formed by each element?
Oct/Nov 2017