Chemistry Practice Test 1 Solution
1. Select the best word from the list to complete each of the following statements. ( 14 marks )
elements, gas, groups, formula, ion, neutralisation, negative, combustion,
decomposition, metals, neutrons, hydroxide, carbonate, positive
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
l.
m.
n.
CO32- is called the carbonate ion.
The formula for Sodium hydroxide is NaOH.
Iron, copper and lead are classified as metals.
An acid reacting with a carbonate produces bubbles of carbon dioxide gas.
An atom that has gained or lost electrons is called an ion.
One substance splitting into two or more substances is called decomposition.
Protons and neutrons are found in the nucleus of atoms.
OH- is called the hydroxide ion.
Columns in the periodic table are called groups.
The reaction between an acid and a base is called neutralisation.
The periodic table contains only elements.
The word combustion means burning.
Protons have a positive charge.
Electrons have a negative charge.
2. Using the Periodic Table, complete the table below. ( 4 marks )
Element Name Element Symbol Atomic number
Lithium
Li
3. Complete the following table. ( 6 marks )
Reaction
Reactants
3
Number of
protons
3
Number of
electrons
3
Products
Precipitation
Two soluble salt solutions
A soluble salt solution and an insoluble salt
Neutralisation
Acid and base
A salt and water
Acid on Carbonate
Acid and carbonate
A salt, water and carbon dioxide gas
Acid on Metal
Acid and metal
A salt and hydrogen gas
4. Identify the mystery substance (P,Q,R,S,T,U) for each reaction. ( 6 marks )
Reaction
Mystery substance
Neutralisation: Hydrochloric acid is added to P and sodium chloride and
P: Sodium hydroxide
water are produced.
Decomposition: Electricity is passed through water and Q and oxygen
Q: Hydrogen
gases are produced.
Combustion: Wood is heated in air and a gas R and water are produced.
R: Carbon dioxide
Precipitation: Aqueous silver nitrate is added to aqueous sodium chloride
and S, a white solid, is observed to have formed at the bottom of the
S: Silver chloride
reaction vessel.
Acid on a carbonate: Hydrobromic acid is added to calcium carbonate and
water, calcium bromide and a gas T are produced. The gas turns lime water T: Carbon dioxide
milky.
MASH: Magnesium metal is placed in acid and a gas U is formed.
U: Hydrogen
5. Match the following chemical equations with their coded representations:
( 6 marks )
1)
C  O 2  CO2
2)
H 2  Cl 2  2HCl
3)
CH 4  Cl 2  CH 3 Cl  HCl
4)
N 2  3H 2  2NH3
5)
CO  H 2 O  CO2  H 2
6)
CH 4  2O 2  CO2  2H 2 O
Equation number
2
3
4
1
5
6
Coded representation
6. Consider groups 1 to 8 of the periodic table and select the group which best matches the following
descriptions: ( 4 marks )
Description
Group
Highly reactive non-metals
7
Highly reactive metals
1
Non-reactive gases.
8
Reactive metals
2
7. Read the description and hence name the following substances and give their atomic symbol or
chemical formula. ( 18 marks )
Description
An acid composed of chlorine and one other
element
A metal in group 3 of the periodic table that is
used to make soft drink containers.
Substance Name
Symbol / Formula
Hydrochloric acid
HCl
Aluminium
Al
Sodium hydroxide
NaOH
The second element in group 1
Lithium
Li
The element with 20 protons
Calcium
Ca
The element with 15 electrons in its atoms
Phosphorous
P
The gas that is detected using the pop test
Hydrogen
H2
Carbon dioxide
CO2
Magnesium oxide
MgO
A base made from sodium, oxygen and hydrogen
A gas that turns limewater milky
The substance produced when magnesium is
combusted in air
8. For a practical investigation you did involving a chemical reaction with an acid as one of the
reactants and a gas as one of the products: ( 8 marks )
a) Write a word equation for the chemical reaction.


Magnesium + hydrochloric acid
→
Magnesium chloride + hydrogen
Calcium carbonate + hydrochloric acid
→
Calcium chloride + water + carbon dioxide
b) Describe the test you performed to confirm the identity of the gas that was produced.


Pop test
Limewater test
9. How many neutrons does nitrogen-14 have?
14 - 7 = 7
( 2 marks )
10. Using the Periodic Table, complete the table below and hence draw the electron
configuration of Magnesium (Mg) and Lithium (Li). Show electrons arranged correctly in
their shells but don’t show protons and neutrons in the nucleus.
(13 marks)
Element
Atomic
number
Number
Number
of
of
protons
electrons
Period
Number
of shells
Electrons in Shell
Group
1st
2nd
3rd
Mg
12
12
12
3
3
2
2
8
2
Li
3
3
3
2
2
1
2
1
-
Magnesium (Mg)
Lithium (Li)
11. Complete the following table: (19 marks)
Cation to
Cation
Charge
Anion
Charge
Anion
Ratio
Salt
formula
Salt name
Na+
+1
F-
-1
1:1
NaF
Sodium Fluoride
Cu2+
+2
CO 32 
-2
1:1
CuCO3
Copper (II) Carbonate
Na+
+1
Cl-
-1
1:1
NaCl
Sodium Chloride
Mg2+
+2
Br-
-1
1:2
MgBr2
Magnesium Bromide
Al3+
+3
O2-
-2
2:3
Al2O3
Aluminium Oxide
Ca2+
+2
OH-
-1
1:2
Ca(OH)2
Calcium Hydroxide
Li+
+1
O2-
-2
2:1
Li2O
Lithium Oxide