Revision for S3 Exam
1. Which of the following numbers is the
same for lithium and oxygen atoms?
A
B
C
D
Mass number
Atomic number
Number of outer electrons
Number of occupied energy levels
2. Which of the following would react
fastest with 2 mol l–1 hydrochloric
acid?
A
B
C
D
Magnesium ribbon
Magnesium powder
Zinc ribbon
Zinc powder
3. Atoms of an element form ions with a
single positive charge and an electron
arrangement of 2, 8. The element is:
A
B
C
D
fluorine
lithium
sodium
neon.
4. Which of the following pairs of
elements combine to form an ionic
compound?
A
B
C
D
Lead and fluorine
Sulphur and oxygen
Carbon and nitrogen
Phosphorus and chlorine
5. Which of the following compounds
exists as diatomic molecules?
A
B
C
D
Carbon monoxide
Sulphur dioxide
Nitrogen trihydride
Carbon tetrachloride
6. Solid ionic compounds do not conduct
electricity because
A the ions are not free to move
B the electrons are not free to move
C solid substances never conduct
electricity
D there are no charged particles in
ionic compounds.
7. What is the most likely pH value that
would be obtained when zinc oxide is
added to water?
(You may wish to use page 5 of the
data booklet to help you.)
A 5
B 7
C 9
D 11
8. Which of the following substances is
not a salt?
A
B
C
D
Copper sulphate
Sodium oxide
Magnesium chloride
Calcium nitrate
9. Which of the following compounds
contains both a transition metal ion
and a halide ion?
A
B
C
D
Aluminium bromide
Cobalt chloride
Iron oxide
Sodium fluoride
10. Which of the following compounds
contains only two elements?
A
B
C
D
Magnesium hydroxide
Magnesium phosphate
Magnesium sulphite
Magnesium nitride
11. A student investigated the reaction
between marble chips and excess
dilute hydrochloric acid.
Which of the following would not
affect the rate of the reaction?
16. Which line in the table describes what
happens to a dilute solution of
hydrochloric acid when water is
added to it?
A Increasing the volume of the acid
B Decreasing the size of the marble
chips
C Decreasing the concentration of
the acid
D Increasing the temperature of the
acid
12. Which line in the table describes a
neutron?
17. Which of the following changes is not
an example of a chemical reaction?
A
B
C
D
13. An atom has 26 protons, 26 electrons
and 30 neutrons. The atom has
A atomic number 26, mass number 56
B atomic number 56, mass number 30
C atomic number 30, mass number 26
D atomic number 52, mass number 56
14. Which of the following oxides
dissolves in water to produce a
solution with a pH greater than 7?
A Na2O
B Al2O3
C SO2
D Ag2O
15. An acidic solution contains
A only hydrogen ions
B more hydrogen ions than hydroxide
ions
C more hydroxide ions than hydrogen
ions
D equal numbers of hydrogen ions
and hydroxide ions.
Ice melting
Iron rusting
Methane burning
Neutralising an acid
18. During the first 20 seconds of a
chemical reaction, 5·0 cm3 of gas were
given off.
The average rate of the reaction, in
cm3s–1, during the first 20 seconds is
A
B
C
D
20·0
5·0
4·0
0·25
19. The formula for magnesium sulphite is
A MgS
B MgSO3
C MgSO4
D MgS2O3.
20. xAl(s) + yBr2(l)  zAlBr3(s)
This equation will be balanced when
A x = 1, y = 2, z = 1
B x = 2, y = 3, z = 2
C x = 3, y = 2, z = 3
D x = 4, y = 3, z = 4
1. Glass is made from the chemical silica, SiO2, which is covalently bonded and has a melting
point of 1700 °C.
(a) What does the melting point of silica suggest about its structure?
(b) Antimony(III) oxide is added to reduce any bubbles that may appear during the
manufacturing process. Write the chemical formula for antimony(III) oxide.
(c) In the manufacture of glass, other chemicals can be added to alter the properties of the
glass. The element boron can be added to glass to make oven proof dishes.
(i) Information about an atom of boron is given in the table below.
Use this information to complete the nuclide notation for this atom of boron.
B
(ii) Atoms of boron exist which have the same number of protons but a different
number of neutrons from that shown in the table.
What name can be used to describe the different atoms of boron?
2. Rapid inflation of airbags in cars is caused by the production of nitrogen gas. The graph
gives information on the volume of gas produced over 30 microseconds.
(a) (i) Calculate the average rate of reaction between 2 and 10 microseconds.
(ii) At what time has half of the final volume of nitrogen gas been produced?
(b) Potassium nitrate is also present in the airbag to remove the sodium metal by converting
it into sodium oxide. Why is it necessary to remove the sodium metal?
3. Oxalic acid reacts with acidified potassium permanganate solution and decolourises it.
The equation for the reaction is:
(a) The reaction is catalysed by the Mn2+(aq) ions produced in the reaction.
Using information from the equation, what type of catalyst is Mn2+(aq)?
(b) A student investigated the effect of surface area on the rate of reaction
with acidified potassium permanganate solution.
It was found that when the rhubarb was cut into three sections the reaction was faster.
Using collision theory, explain why cutting the rhubarb into three sections increases the rate
of reaction.
(c) Calculate the GFM of oxalic acid, C2H2O4.
4. The properties of a substance depend on its type of bonding and structure.
There are four types of bonding and structure.
(a) Complete the table to match up each type of bonding and structure with its properties.
(b) A section of a covalent network compound is shown below.
Write the formula for this covalent network compound.
(c) Explain how covalent bonds are held together.
5. Information on some two-element molecules is shown in the table.
(a) Complete the table to show the shape of a molecule of ammonia.
(b) The hydrogen fluoride molecule can be represented as:
Showing all outer electrons, draw a similar diagram to represent a molecule of water, H2O.
6. Hydrogen peroxide is a useful bleaching agent and is contained in many hair dyes. Over time,
the hair dye becomes less effective as the hydrogen peroxide decomposes forming water
and oxygen. The equation for the decomposition of hydrogen peroxide is:
(a) Balance this equation.
7. People often drink lemonade to quench their thirst.
Lemonade contains citric acid.
(a) Suggest a pH value for lemonade.
8. Ammonium sulphate is a commonly used fertiliser. It can be produced by the reaction
between ammonium carbonate and calcium sulphate.
(a) Name this type of chemical reaction.
9. Elements are made up of atoms.
An atom of an element is represented by the diagram below.
(a) What name is given to the part of the atom which contains protons and neutrons?
(b) Using the information in the diagram:
(i) state the mass number of this atom;
(ii) explain why this atom is electrically neutral;
(iii) name the family of elements to which this atom belongs
(iv) if this atom was to lose an electron, what would be the overall charge?
10. Cool packs can be used to treat some sports injuries.
The pack contains solid ammonium nitrate and water in two separate compartments. When
the pack is squeezed the ammonium nitrate dissolves in the water forming a solution. This
results in a drop in temperature.
(a) What term is used to describe a reaction in which there is a drop in temperature?
(b) The equation for the reaction taking place in the cool pack is shown
Complete the equation by adding state symbols.
(c) What name is given to a liquid, such as water, that can be used to dissolve substances?
11. Slaked lime can be added to lochs to reduce acidity.
(a) What causes the lochs to become acidic?
(b) Slaked lime can be made from limestone.
Name the elements present in calcium carbonate.