1. States of matter

1.1 Solids, liquids and gases

1.2 Diffusion

2. Atoms, elements and compounds

2.1 Elements, compounds and mixtures

2.2 Atomic structure and the Periodic Table

2.3 Isotopes

2.4 Ions and ionic bonds

2.5 Simple molecules and covalent bonds

2.6 Giant covalent structures

2.7 Metallic bonding

3. Stoichiometry

3.1 Formulae

3.2 Relative masses of atoms and molecules

3.3 The mole and the Avogadro constant

4. Electrochemistry

4.1 Electrolysis

4.2 Hydrogen–oxygen fuel cells

5. Chemical energetics

5.1 Exothermic and endothermic reactions

6. Chemical reactions

6.1 Physical and chemical changes

6.2 Rate of reaction

6.3 Reversible reactions and equilibrium

6.4 Redox

7. Acids, bases and salts

7.1 The characteristic properties of acids and bases

7.2 Oxides

7.3 Preparation of salts

8. The Periodic Table

8.1 Arrangement of elements

8.2 Group I properties

8.3 Group VII properties

8.4 Transition elements

8.5 Noble gases

9. Metals

9.1 Properties of metals

9.2 Uses of metals

9.3 Alloys and their properties

9.4 Reactivity series

9.5 Corrosion of metals

9.6 Extraction of metals

10. Chemistry of the environment

10.1 Water

10.2 Fertilisers

10.3 Air quality and climate

11. Organic chemistry

11.1 Formulae, functional groups and terminology

11.2 Naming organic compounds

11.3 Fuels

11.4 Alkanes

11.5 Alkenes

11.6 Alcohols

11.7 Carboxylic acids

11.8 Polymers

12. Experimental techniques and chemical analysis

12.1 Experimental design

12.2 Acid–base titrations

12.3 Chromatography

12.4 Separation and purification

12.5 Identification of ions and gases

IGCSE Chemistry 7.2 Oxides Question Bank

[Maximum number: 1]

A list of substances is shown.
> barium nitrate carbon monoxide hydrated cobalt(II) chloride copper(II) oxide anhydrous copper(II) sulfate ethane potassium iodide propene sodium bromide sulfur dioxide zinc oxide

Answer the following questions using only the substances from the list. Each substance may be used once, more than once or not at all.

Give the name of the substance that:

(a)

is an acidic oxide

[ 1 ]

[Maximum number: 2]

Iron ore contains iron(III) oxide, $\mathrm{Fe}_{2} \mathrm{O}_{3}$ . A blast furnace is used to extract iron from $\mathrm{Fe}_{2} \mathrm{O}_{3}$ .
Equations for some of the reactions in the blast furnace are shown.

equation $1 \mathrm{C}+\mathrm{O}_{2} \rightarrow \mathrm{CO}_{2}$

equation $2 \mathrm{CaCO}_{3} \rightarrow \mathrm{CaO}+\mathrm{CO}_{2}$

equation $3 \quad \mathrm{CaO}+\mathrm{SiO}_{2} \rightarrow \mathrm{CaSiO}_{3}$

(a)

(i)

Explain why the reaction in equation 3 can be described as an acid-base reaction.

[ 2 ]

[Maximum number: 1]

Period 3 of the Periodic Table is shown.

Answer the following questions using only these elements.
Each element may be used once, more than once or not at all.
State which element:

(a)

forms a basic oxide with a formula of the form $\mathrm{X}_{2} \mathrm{O}$

[ 1 ]

(a)

This question is about elements.
> aluminium
> carbon iron hydrogen oxygen silicon sodium sulfur

Answer the following questions about these elements.
Each element may be used once, more than once or not at all.

[ 1 ]

(i)

Name the element that forms an amphoteric oxide.

[ 1 ]

[Maximum number: 1]

The symbols of the elements of Period 3 of the Periodic Table are shown.

Answer the following questions about these elements.
Each element may be used once, more than once or not at all.
Write the symbol of an element which:

(a)

forms an amphoteric oxide

[ 1 ]

[Maximum number: 1]

The names of the elements of Period 2 of the Periodic Table are shown.
lithium beryllium boron carbon nitrogen oxygen fluorine neon Answer the following questions about these elements. Each element may be used once, more than once or not at all.

Identify the element which:

(a)

forms a basic oxide with the formula $\mathrm{X}_{2} \mathrm{O}$

[ 1 ]

[Maximum number: 3]

Period 3 contains the elements sodium to argon. This question asks about the chemistry of each of the Period 3 elements or their compounds.

(a)

Aluminium oxide is amphoteric. It is insoluble in water.

Describe experiments to show that aluminium oxide is amphoteric.

[ 3 ]

[Maximum number: 7]

Some oxides of some elements are listed.

(a)

Answer the following questions using only oxides from the list. Each oxide may be used once, more than once or not at all.

Give the formula of an oxide

[ 6 ]

(i)

which is amphoteric,

(ii)

which is neutral.

[ 6 ]

(b)

Amphoteric oxides and neutral oxides are different from each other.

[ 1 ]

(i)

What is meant by the term amphoteric oxide?

[ 1 ]

(a)

The symbols of the elements in Period 3 of the Periodic Table are shown.

Use the symbols of the elements in Period 3 to answer the questions that follow. Each symbol may be used once, more than once, or not at all.

Give the symbol of the element that:

[ 1 ]

(i)

forms an amphoteric oxide [1]

[ 1 ]

[Maximum number: 1]

Flerovium, Fl, atomic number 114, was first made in research laboratories in 1998.

(a)

Only a relatively small number of atoms of flerovium have been made in the laboratory and the properties of flerovium have not yet been investigated.

It has been suggested that flerovium is a typical metal.

[ 1 ]

(i)

Suggest one chemical property of flerovium oxide.

[ 1 ]

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