Oxides

Identify the row that correctly describes the oxides.

May/June 2015

A non-metal element produces oxides with the formulas $\text{XO}_2$ and $\text{XO}_3$. Which element is $X$?

May/June 2015

Identify the oxide that is amphoteric.

May/June 2016

Small quantities of sulfur dioxide may be added to bottled fruit juice. What is this for?

May/June 2017

Select the oxides listed below to answer the questions. calcium oxide carbon dioxide copper(II) oxide silicon dioxide sodium oxide sulfur dioxide sulfur trioxide zinc oxide Any oxide may be used once, more than once, or not used at all.

May/June 2017

Which pair of gases are both not acidic?

May/June 2018

Lead(II) oxide, $\text{PbO}$, reacts with dilute nitric acid, so it neutralises the acid. Lead(II) oxide also reacts with aqueous sodium hydroxide, so it neutralises the alkali. Which term best describes lead(II) oxide?

May/June 2018

A list of atmospheric pollutants is given below. 1. sulfur dioxide 2. methane 3. nitrogen dioxide 4. unburned hydrocarbons Which of these substances could be removed by being made to react with calcium carbonate?

May/June 2019

Identify the substance that produces oxides of nitrogen on combustion.

May/June 2019

Sulfur dioxide and oxides of nitrogen are substances that pollute the air.

May/June 2021

Select the answers from the oxides listed below. Al$_2$O$_3$ Co CO$_2$ CaO Fe$_2$O$_3$ H$_2$O Na$_2$O SO$_2$ SiO$_2$ Each oxide may be used once, more than once or not at all. State which oxide:

May/June 2023

Select one oxide from the list below to answer the questions. CO CO$_2$ CaO CuO Fe$_2$O$_3$ H$_2$O SO$_2$ SiO$_2$ ZnO Use each oxide no more than once, more than once, or not at all. State which oxide:

May/June 2023

Which element combines with oxygen to form an amphoteric oxide?

May/June 2025

An element is combusted in excess oxygen. Which statement about the oxide produced is always correct?

Oct/Nov 2015

An element is burned in excess oxygen. Which statement about the oxide produced is always true?

Oct/Nov 2015

The table presents several facts about sulfur dioxide and sulfuric acid, together with comments on those facts. Which row is correct?

Oct/Nov 2020

Which of the following statements about sulfur dioxide, $\text{SO}_2$, is correct?

Oct/Nov 2021

Choose your answers from the oxides listed below. aluminium oxide calcium oxide iron(II) oxide magnesium oxide silicon dioxide sodium oxide sulfur dioxide Each oxide may be selected once, selected more than once, or not selected at all. State which oxide:

Oct/Nov 2021

Pollution can be produced by oxides of carbon, nitrogen and sulfur. Which elements are capable of forming more than one oxide?

Oct/Nov 2022

The table gives details about certain oxides. structure: simple molecular effect of water: dissolves and forms an acid For which of nitrogen, phosphorus, sulfur and silicon could this description of their oxides be correct?

Oct/Nov 2022

Which two oxides are able to react with aqueous sodium hydroxide?

Oct/Nov 2023

Some information about three oxides, Q, R and T, is provided. Q reacts with dilute sulfuric acid to produce a salt and water. R reacts with both acids and bases to produce a salt and water. T reacts with aqueous sodium hydroxide to produce a salt and water. Using only this information, which row gives the correct classification of the three oxides?

Oct/Nov 2023

Which statement concerning oxides is correct?

Oct/Nov 2024

Oxide Q is added to separate samples of dilute hydrochloric acid and aqueous potassium hydroxide. Each reaction forms a salt and water. Which statement is correct?

Oct/Nov 2024

Several characteristics of a solid oxide are given: when it reacts with dilute sulfuric acid, a salt and water are formed; it does not dissolve in water; it also reacts with aqueous sodium hydroxide. Which oxide is being described?

Oct/Nov 2025