Question 1
Why is the melting point of a pure substance considered a characteristic property?
A)
The melting point is measured with a thermometer.
B)
The melting point is a qualitative property.
C)
The melting point is a property that may identify a pure substance.
D)
The melting point is a quantitative property.
Question 2
A student heated a pure substance in a test tube and made the following observations.
Substance Before
Being Heated
Substance While
Being Heated
Substance After
Being Heated
Colour
White
No change
White
State
Mass
Solid
2.5 g
No change
----------
Solid
2.4 g
----------
CO2 released
----------
Other Observation
Given these observations, which of the following statements is definitely TRUE?
A)
Before being heated, the solid substance was an element.
B)
Before being heated, the solid substance was a compound.
C)
After being heated, the solid substance was an element.
D)
After being heated, the solid substance was a compound.
Question 3
Which of the following atomic models correctly represents the aluminum atom
A)
C)
13 p+
14 n°
2e-
B)
27
Al?
13
14 p+
13 n°
11e-
2e-
8e-
4e-
2e-
8e-
3e-
D)
14 p+
13 n°
13 p+
14 n°
2e-
12e-
Question 4
The following are properties of two elements belonging to two different chemical families:
Element X: A greenish-yellow gas that is very reactive
Element Y: A metal that reacts violently with water
To which families do these two elements belong?
A)
Element X is an alkali metal and element Y is a halogen.
B)
Element X is a halogen and element Y is an alkali metal.
C)
Element X is an inert gas and element Y is an alkaline earth metal.
D)
Element X is a halogen and element Y is an alkaline earth metal.
Question 5
The table below shows what happens when an electrically charged ruler is brought close to the
following three objects: a cathode ray tube, charged sphere 1 and charged sphere 2.
Combination
Result
Ruler is brought close to cathode ray tube.
The ray is repelled.
Ruler is brought close to sphere 1.
Sphere 1 is repelled.
Ruler is brought close to sphere 2.
Sphere 2 is attracted.
What is the electric charge on each sphere?
A)
Sphere 1 is positively charged and sphere 2 is positively charged.
B)
Sphere 1 is positively charged and sphere 2 is negatively charged.
C)
Sphere 1 is negatively charged and sphere 2 is positively charged.
D)
Sphere 1 is negatively charged and sphere 2 is negatively charged.
Question 6
In the laboratory, a student made the following observations about an unknown gaseous substance that
was to be identified.
Observations
Result
Colour
Colourless
Odour
Odourless
Mass
0.16 g
Volume
128 mL
Burning splint test
No reaction
Glowing splint test
No reaction
Limewater test
No reaction
The student was also given a table with the following information :
Vade-mecum
Observation
Odour
Density
(g/mL)
Burning
Splint
Test
Glowing
Splint
Test
Limewater
Test
Gas
Colour
Nitrogen gas
Colourless
Odourless
0.00125
No
reaction
No
reaction
No
reaction
Hydrogen
gas
Colourless
Odourless
0.00009
Popping
Sound
No
reaction
No
reaction
Carbon
dioxide
Colourless
Odourless
0.00198
No
reaction
No
reaction
Becomes
cloudy
Helium
Colourless
Odourless
0.0018
No
reaction
No
reaction
No
reaction
Using all the above information, identify this unknown gas.
A)
Nitrogen gas
C)
Carbon dioxyde
B)
Hydrogen gas
D)
Helium
Question 7
Which of the following diagrams best represents the magnetic fields produced by two magnets?
A)
C)
N
S
N
S
S
N
S
N
B)
D)
N
S
N
S
S
N
S
N
Question 8
Four electric circuits are illustrated below.
Circuit 1
Circuit 3
A
A
Circuit 2
Circuit 4
A
A
Which two circuit diagrams show the proper connection for an ammeter that measures the total current
in the circuit?
A)
1 and 3
C)
2 and 3
B)
1 and 4
D)
2 and 4
Question 9
Which of the following represents a unit of electric energy?
A)
V•A
C)
W
B)
J
D)
J/s
Question 10
Which of the following electrical appliances convert electric energy into mechanical energy?
1. Baseboard heater
2. Kettle
3. Drill
4. Battery charger
5. Microwave open
6. Halogen lamp
7. Fan
8. Television
A)
1 and 2
C)
4 and 8
B)
3 and 7
D)
5 and 6
Question 11
Which combination will create the strongest electromagnet?
A)
A solenoid with 200 turns, a 10-ampere current and an iron core
B)
A solenoid with 200 turns, a 10-ampere current and an aluminum core
C)
A solenoid with 400 turns, a 15-ampere current and an iron core
D)
A solenoid with 400 turns, a 15-ampere current and an aluminum care
Question 12
The following graph illustrates the change in the current intensity, I, in a circuit as a function of the
potential difference (voltage), V, across its terminals.
I (A)
2.0
1.5
4.5 6.0 V (V)
What is the conductance, G, of this circuit?
A)
0.33 S
C)
1.33 S
B)
0.75 S
D)
3.00 S
Question 13
Two electric circuits consist of a power source, two resistors and two voltmeters connected as shown
in the circuit diagrams below.
Circuit A
Circuit B
V1 = 6 V
V1
VB
VA
V 3 V3 = 6 V
V4 V 4 = 6 V
V2
V2 = 6 V
Each voltmeter reads 6 V.
What are the potential differences (voltages), VA and VB, across the terminals of the power sources for
circuits A and B?
A)
VA = 6 V and VB = 6 V
C)
VA = 6 V and VB = 12 V
B)
VA = 12 V and VB = 6 V
D)
VA = 12 V and VB = 12 V
Question 14
The rating plate on an electrical appliance gives the following information :
Model 98 JFRB
Serial # : MV
120 V
(0.6 kW)
This appliance is used 24 minutes a day for 30 days. Electricity costs $0.05/kW•h.
How much does it cost to use this appliance for 30 days?
A)
$0.01
C)
$0.90
B)
$0.36
D)
$21.60
Question 15
Which of the following are characteristic properties of a basic solution?
1.
2.
3.
4.
5.
Conducts electricity
Does not conduct electricity
Turns litmus paper blue
Turns litmus paper red
Does not change the colour of litmus paper
A)
1 and 3
C)
2 and 3
B)
1 and 4
D)
2 and 5
Question 16
The table on the right gives the colours of a universal indicator
when it is added to solutions with different pH values.
A solution turns yellow in the presence of this indicator.
pH
Colour
1
Red
3
Orange
5
Yellow
7
Green
9
Purple
11
Blue
13
Violet
What is the nature of this solution?
A)
It is an acidic solution.
C)
It is a basic solution.
B)
It is an alkaline solution.
D)
It is a neutral solution.
Question 17
Which gases are responsible for the depletion of the ozone layer?
A)
Sulfur dioxide (SO2) and nitrogen oxides (NOx)
B)
Carbon dioxide (CO2) and carbon monoxide (CO)
C)
Chlorofluorocarbons (CFC's) and freon
D)
Methane (CH4) and airborne dust
Question 18
You are given 60 mL of a 45 g/L aqueous solution and asked to dilute it to obtain a concentration of
30 g/L.
What is the volume of the resulting solution?
A)
22.5 mL
C)
90 mL
B)
40 mL
D)
105 mL
Question 19
Which of the following newspaper items contradicts the law of conservation of matter?
A)
″Three tonnes of a miracle fuel combines with eight tonnes of oxygen to form one
tonne of greenhouse gas and ten tonnes of water vapour. ″
B)
″ Scientists have finally compressed four kilograms of lead into three kilograms of
gold. ″
C)
″ Yesterday, two water molecules were converted into two hydrogen molecules and
one oxygen molecule. ″
D)
″ Local high school students discovered that adding 25 kJ of energy to 10 g of ice
produces 10 g of water vapour. ″
PART B
This part of the examination consists of questions 20 to 25.
Answer all six (6) questions in the answer booklet.
Question 20
The following table gives the characteristic properties of three elements.
Element
Density
(g/cm3)
Electrical
Conductivity
Melting
Point (°C)
Malleability
Ductility
Aluminum
(Al)
2.7
Good
660
Good
Good
Gold
(Au)
18.9
High
1064
High
High
Tungsten
(W)
19.3
Average
3410
Average
Average
Consider the following technological applications :
• Filament for an electric light bulb
• Body of an airplane
- Match each technological application with the element most suitable for that purpose.
- For each application, name one characteristic property that makes this element suitable.
- Justify your choice.
Question 21
Four elements from the periodic table are described below.
A.
It reacts violently with water.
Its electrons are distributed among three energy levels.
B.
It is a gas at room temperature.
It has one electron on its outermost energy level.
C.
Its electron configuration is : 2-8-7.
D.
It is a metalloid.
IA
1
VIII A
18
II A
2
III A IV A
13
14
V A VI A VII A
15
16
17
Write the letters A, B, C and D in the appropriate blank boxes of the periodic table provided in your
answer booklet.
Question 22
The following electric circuit consists of a power source, two resistors (R1 and R2) and an
ammeter A . The ammeter reads 2 A.
I=2 A
A
Vt
R1
10 Ω
R2
10 Ω
What is the potential difference (voltage), Vt, across the terminals of the power source?
Show all your work.
Question 23
A student heated a certain amount of water in a calorimeter fitted with a resistor and made the
following observations during the experiment :
Mass of the water
150 g
Initial temperature of the water
20°C
Final temperature of the water
25°C
Duration of the experiment
10 min
How much energy was absorbed by the water?
Show all your work.
Question 24
In the laboratory, a student prepared four solutions of sodium chloride (NaCl). In the
table below, she recorded the quantities related to each solution.
Solution
Quantity
of solute
(g)
Volume of
the solution
(L)
1
10
2
2
2
0.5
3
15
1.75
4
1
0.1
Which of these solutions is the most concentrated?
Explain your answer by determining the concentration of each of the four solutions.
Question 25
One way of producing copper (Cu) is to combine aluminum (Al) with copper chloride
(CuCl2). This reaction produces aluminum chloride (AlCl3) and copper (Cu).
The unbalanced equation for this reaction is given below. :
Al + CuCl2 → AlCl3 + Cu
Balance this equation correctly.
NOTE : If you make any mistakes in balancing this equation, you will be given 0
marks for this question.