1
1
Aqueous chlorine reacts with aqueous sodium iodide.
Cl2 + 2NaI → I2 + 2NaCl
(a) How does this reaction show that chlorine is more reactive than iodine?
...........................................................................................................................................
[1]
(b) What colour is iodine in aqueous solution?
...........................................................................................................................................
[1]
[Total: 2]
2
Element X can undergo the following physical changes.
gaseous X
boiling or
evaporation
2
4
liquid X
3
1
solid X
(a) Give the scientific name for each of the numbered physical changes.
1 ........................................................................................................................................
2 ........................................................................................................................................
3 ........................................................................................................................................
4 ........................................................................................................................................
[4]
(b) Explain why the changes shown are physical changes.
...........................................................................................................................................
...........................................................................................................................................
[1]
(c) One difference between boiling and evaporation is the rate at which the processes occur.
State one other difference between boiling and evaporation.
...........................................................................................................................................
...........................................................................................................................................
[1]
[Total: 6]
2
3
Iron is extracted from iron ore in a blast furnace.
(a) Name an ore of iron.
...........................................................................................................................................
(b)
(i)
[1]
Complete the chemical equation for the reduction of iron(III) oxide in the blast furnace.
Fe2O3 + .......CO → .......Fe + 3CO2
(ii) State the meaning of the term reduction.
[2]
................................................................................................................................
[1]
(c) Calcium carbonate (limestone) is added to the blast furnace.
The calcium carbonate undergoes thermal decomposition.
State the meaning of the term thermal decomposition.
...........................................................................................................................................
...........................................................................................................................................
[2]
[Total: 6]
4
Describe the reaction of excess dilute hydrochloric acid with magnesium and with
magnesium carbonate.
Give the names of the products and any observations.
(a) reaction with magnesium
products.............................................................................................................................
...........................................................................................................................................
observations......................................................................................................................
...........................................................................................................................................
[2]
(b) reaction with magnesium carbonate
products.............................................................................................................................
...........................................................................................................................................
observations......................................................................................................................
...........................................................................................................................................
[2]
[Total: 4]
5
Sodium hydroxide is an alkali.
3
(a) State the colour change when excess aqueous sodium hydroxide is added to a solution of
methyl orange in acid.
from ..................................................................................................................................
to .......................................................................................................................................
[2]
(b) Choose the pH value of an alkali.
Draw a circle around your answer.
pH 3
pH 5
pH 7
pH 14
[1]
[Total: 3]
6
This question is about acids, bases and salts.
Describe the reaction of excess dilute sulfuric acid with magnesium carbonate and with magnesium
oxide.
Give the names of the products and any observations.
(a) reaction with magnesium carbonate
products ............................................................................................................................
observations .....................................................................................................................
...........................................................................................................................................
[2]
(b) reaction with magnesium oxide
products ............................................................................................................................
observations .....................................................................................................................
...........................................................................................................................................
[2]
[Total: 4]
7
(a) Describe how universal indicator can be used to find the pH of an acidic solution.
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
[2]
4
(b) Choose the pH value that is acidic.
Draw a circle around your answer.
pH 2
pH 7
pH 10
pH 14
[1]
[Total: 3]
8
State the colour change when excess aqueous sodium hydroxide is added to a solution of litmus
in dilute sulfuric acid.
from ..........................................................................................................................................
to ..............................................................................................................................................
[2]
[Total: 2]
9
State the colour change when excess hydrochloric acid is added to a solution of methyl orange in
alkali.
from ..........................................................................................................................................
to ..............................................................................................................................................
[2]
[Total: 2]
10 This question is about elements in the Periodic Table.
5
(a) The table shows some properties of five elements, P, Q, R, S and T.
element
melting point
/°C
density
in g/cm
3
electrical conductivity
of the solid
atomic radius
/nm
P
63
0.86
very good
0.235
Q
−7
3.12
does not conduct
0.114
R
839
1.54
very good
0.174
S
1495
8.9
very good
0.126
T
−157
0.0035
does not conduct
0.110
Use only the elements shown in the table to answer this question.
State which two of the elements, P, Q, R, S and T, are covalent molecules.
Give two reasons for your answer.
elements .......................................................... and ..........................................................
reason 1 ...........................................................................................................................
reason 2 ...........................................................................................................................
[3]
(b) Describe how the metallic character of the elements depends on their position in the Periodic
Table.
...........................................................................................................................................
...........................................................................................................................................
[1]
[Total: 4]
11
The symbols of the elements of Period 3 of the Periodic Table are shown.
Na
Mg
Al
Si
P
S
Cl
Ar
Write the symbol of an element which has only two electrons in its outermost shell.
..................................................................................................................................................
[1]
[Total: 1]
12 The symbols of the elements of Period 3 of the Periodic Table are shown.
Na
Mg
Al
Si
p
S
Cl
Ar
Write the symbol of an element which forms an oxide which leads to acid rain.
..................................................................................................................................................
[1]
6
[Total: 1]
13 The symbols of the elements of Period 3 of the Periodic Table are shown.
Na
Mg
Al
Si
P
S
Cl
Ar
Write the symbol of an element which exists as diatomic molecules.
..................................................................................................................................................
[1]
[Total: 1]