TIME : 2 hours
Kativik School Board 2010
2
Kativik School Board 2010
556-470 – Physical Science 416
Instructions:
1.
Read all the instructions before starting.
2.
Answer ALL questions in the ANSWER BOOKLET.
3.
Each question is worth a maximum of 4 points. Even if an
answer is wrong, partial marks may be awarded for supporting
work. It is in your best interest not to leave any question blank.
A blank question is an automatic ZERO.
4.
Use of a ruler, compass, protractor, graph paper and a
scientific calculator (EXCEPT graphing calculators) is allowed.
5.
You have a minimum of 1 hour and a maximum of 2 hours to
complete this exam.
6.
The next page contains all the formulas you will need to
complete the exam.
7.
Take your time and recheck your answers prior to turning in
your exam.
Good Luck
Kativik School Board 2010
Kativik School Board 2010
Kativik School Board 2010
PART A
This part of the examination contains questions 1 to 19.
Answer these 19 questions in your ANSWER BOOKLET. For each
question, fill in the box under the letter that corresponds to your
answer.
1
In the laboratory, you are asked to analyze a liquid.
You perform 4 tests.
You obtain the following results:
TEST
RESULT
Blue litmus paper
Turns red
Red litmus paper
Stays red
Cobalt chloride paper
Turns pink
Electrical conductivity
Conducts electricity
What can we say about that liquid?
A) It is distilled water
C) It is a basic solution
B) It is an acidic solution
D) It is a neutral solution
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Kativik School Board 2010
556-470 – Physical Science 416
2
In the laboratory, you heat a solution.
You observe the following changes:
OBSERVATIONS
AFTER THE
BEFORE THE
SOLUTION WAS
SOLUTION WAS
HEATED
HEATED
1. Colour
Blue
Orange
None
None
3. Presence of a precipitate
No
Yes
4. Mass (g)
12.5
12.0
2. Odor
Which of these observations indicate that a chemical change occurred
during this experiment?
A) Observations 1 and 3
C) Observations 2 and 3
B) Observations 1 and 4
D) Observations 3 and 4
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Kativik School Board 2010
556-470 – Physical Science 416
3
For chemistry, we use balls of different sizes and different
colors to represent the different atoms in a molecule.
Which of the following diagram correctly represents the two
molecules H2O and H2 ?
A)
C)
H2O
H2
B)
H2 O
H2
H2 O
H2
D)
H2O
H2
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Kativik School Board 2010
556-470 – Physical Science 416
4
The following tables list four chemical families and four
characteristic properties:
CHEMICAL FAMILY
CHARACTERISTIC PROPERTY
1. Alkaline earth metals
a. Elements that are chemically stable
2. Halogens
b. Elements that react vigorously with
water to form a base
3. Alkali metals
c. Elements that react with alkali metals
to form salts
4. Inert gases
d. Elements that have two valence
electrons
Which of the following choices correctly matches …
•
•
A chemical family
with
Its characteristic property?
A) 1b, 2d, 3a, 4c
C) 1d, 2c, 3a, 4b
B) 1c, 2b. 3d, 4a
D) 1d, 2c, 3b, 4a
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Kativik School Board 2010
556-470 – Physical Science 416
5
You have four balls A, B, C, D. They are charged positively (+)
OR negatively (-). We know that ball A is charged positively (+).
A
B
C
D
The following diagrams show what happens when the balls are suspended
from wires, close to each other:
A
B
A C
B
D
What will happen if we place balls B and C together and
ball C and D together?
A)
B
C
B
C
C
D
B)
C D
C)
B
C
B
C
C
D
D)
C D
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Kativik School Board 2010
556-470 – Physical Science 416
6
Some laboratory work is carried out on a solid to determine some of
its properties:
Test for electrical
conductivity:
Bring a magnet
close to the solid:
The light glows dimly.
The solid is attracted
by the magnet.
The volume of
water without
the solid is 30 mL.
30mL
→
The volume of
water with the
solid is 37 mL.
45
40
35
30
25
20
15
10
05
45
40
35
30
25
20
15
10
05
37mL
←
Measure of
the mass of the
solid: 55 g.
55
g
Four students from the Physical Science 416 class must note
the results of these experiments:
STUDENT
CONDUCTIVITY
MAGNETISM
DENSITY (g/mL)
JUSTIN
YES
NO
7.86
MOSES
NO
NO
1.49
GALIA
YES
YES
1.49
PAMELA
YES
YES
7.86
Which student's overall results are correct?
A) JUSTIN
C) GALIA
B) MOSES
D) PAMELA
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Kativik School Board 2010
556-470 – Physical Science 416
7
Bellow is an electromagnet:
Turns (of wire)
Iron core
–
+
How can we increase the strength of the magnetic field
produced by this electromagnet?
A) We must increase the temperature
B) We must decrease the number of wire turns around the iron core.
C) We must increase the current intensity.
D) We must replace the iron core with a copper core.
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Kativik School Board 2010
556-470 – Physical Science 416
8
Bellow is an electric circuit:
1
R1
R2
2
3
4
Four measuring instruments are connected to that circuit: , , , .
Which instrument measures the intensity of the current flowing
through resistor R1?
A) instrument number 1
C) instrument number 3
B) instrument number 2
D) instrument number 4
9
Which of the following statements about the conductivity
of a copper wire is true?
A) If you increase its temperature, its conductivity will increase.
B) If you increase its length,
its conductivity will increase.
C) If you decrease its diameter
its conductivity will increase.
D) If you decrease its diameter
its conductivity will decrease.
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Kativik School Board 2010
556-470 – Physical Science 416
10
Bellow are 2 solenoids (electromagnets) and a magnet:
N
S
–
+
+
–
Magnet
Solenoid 1
(Electromagnet)
Solenoid 2
(Electromagnet)
An electric current flows through the two solenoids
(electromagnets).
Which of the following statements is COMPLETELY true?
A) The magnet is repelled by solenoid 1 and attracted by solenoid 2.
B) The magnet is attracted by solenoid 1 and repelled by solenoid 2.
C) The magnet is repelled by solenoids 1 and 2.
D) The magnet is attracted by solenoids 1 and 2.
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Kativik School Board 2010
556-470 – Physical Science 416
11
The following table shows measurements related to four
different resistors.
RESISTOR
POTENTIAL
DIFFERENCE (V)
CURRENT INTENSITY
(A)
1
20
20
2
3
4
5
30
10
RESISTANCE
()
3
20
5
Which of these resistors has the lowest conductance?
A) Resistor 1
C) Resistor 3
B) Resistor 2
D) Resistor 4
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Kativik School Board 2010
556-470 – Physical Science 416
12
Bellow is an electric circuit:
V1 = 10 V
V1
R1
VT
R2
AT
IT = 0.8 A
25 Ω
We know that:
•
The potential difference across the terminals of resistor R1 is 10 V
•
The current IS flowing through ammeter AT is 0.8 A.
What is the equivalent resistance of this circuit?
A) 0.12 C) 12.5 B) 8.3 D) 37.5 16
Kativik School Board 2010
556-470 – Physical Science 416
13
Bellow is an electric circuit:
V1
V1 = 6 V
L1
VT = ?
L2
L3
V3
V3 = 6 V
We know that:
•
The light bulbs L1, L2, L3 are identical (are the same);
•
The potential difference across the terminals of L1 and L3 is 6 V.
What is the potential difference across the terminals of VT
A) 2 V
C) 12 V
B) 6 V
D) 18 V
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Kativik School Board 2010
556-470 – Physical Science 416
14
The rating plate of a dryer is given below:
We know that:
•
This dryer is used for 45 minutes each day.
•
Electricity costs $0.06 per kW•h.
How much does it cost to use this dryer for 30 days?
A) $0.27
C) $16.20
B) $8.10
D) $486
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Kativik School Board 2010
556-470 – Physical Science 416
15
Bellow is a list of properties:
PROPERTIES
1. Become white when put in contact with CO2
2. Always has a pH greater than 7
3. Can neutralize an acid solution
4. Conducts electricity
5. Turns red litmus paper into blue
6. Turns blue litmus paper into red
7. Does not change the colour of litmus paper
Which of these properties are characteristic properties
of bases ONLY?
A) 1, 3 and 6
C) 2, 3 and 5
B) 1, 4 and 5
D) 2, 4 and 7
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Kativik School Board 2010
556-470 – Physical Science 416
16
Bellow is a table with the colours associated with a given
pH indicator:
pH
Colour
2
3
Red
4
5
Orange
6
7
Yellow
8
9
Green
10
11
12
Blue
When two drops of this indicator are added to a solution of
unknown pH, the solution turns red.
What can you conclude about this solution?
A) It is a weak acid.
B) It is a strong acid.
C) It is a weak base.
D) It is a strong base.
17
Which one of the following substances must you use to
neutralizea solution with a pH of 4
A) HCl
C) KOH
B) H2O
D) NaBr
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Kativik School Board 2010
556-470 – Physical Science 416
18
Bellow is a table that lists four potassium chloride (KCI)
solutions. Each solution has a different concentration.
SOLUTION
CONCENTRATION
1
2% m/V
2
0.5 g/10 mL
3
10 g/L
4
30 g/2000 mL
Sort these solutions from the LOWEST concentration to the HIGHEST
concentration:
A) 1, 4, 3 and 2
C) 2, 3, 1 and 4
B) 2, 1, 4 and 3
D) 3, 4, 1 and 2
19
Which of the following equations is correctly balanced?
A) 2 NaHCO3 + H2SO4
Na2SO4 + 2 H2O + CO2
B) C3H8 + 5 O2
3 CO2 + 4 H2O
C) 4 H2 + 2 O2
8 H2 O
D) 4 HNO3
4 NO2 + 2 H2O + 2 O2
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Kativik School Board 2010
556-470 – Physical Science 416
PART B
This part of the examination contains questions 20 to 25.
For each question, write your answer in the space provided in your
ANSWER BOOKLET.
20
The following chart gives the description of six elements
from the periodic table.
ELEMENT
DESCRIPTION
1.
It is an alkaline earth metal located in Period 3.
2.
It is a halogen with two energy levels.
3.
It is part of Group IIIA (13) and located in Period 4.
4.
Its mass number is 79.
5.
It has 15 protons.
6.
Its electron configuration is: )2e- )8e- )8e-
Identify each of these elements and write its chemical symbol in
the table in your Answer Booklet.
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Kativik School Board 2010
556-470 – Physical Science 416
21
The following graph represents the first 9 elements of the
periodic table:
Number
of neutrons 9
8
7
6
5
4
3
2
1
1 2 3 4 5 6 7 8 9
Atomic
number
You must first identify the element that has three isotopes.
Then in your Answer Booklet, write its chemical symbol and the
mass number of each of its isotopes.
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Kativik School Board 2010
556-470 – Physical Science 416
22
Bellow is an electric circuit:
I2 = ?
A2
VT = 9 V
R1 = 12 Ω
R2
AT
IT = 3 A
We know that:
•
The resistance of resistor R1 is 12 ;
•
The ammeter AT reads a total current (IT) of 3 A;
•
The potential difference across the terminals of the power
supply VT is 9 V.
What is the intensity of the current flowing through resistor R2 ?
Show all your work in your Answer Booklet.
23
A very hot metal bar was immersed (was put) in 4 000 mL of water.
•
The initial temperature of water was 16 °C.
•
This raised the water temperature to 30 °C.
How much heat did the water absorb in joules (J)?
Show all your work in your Answer Booklet.
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Kativik School Board 2010
556-470 – Physical Science 416
24
A student dilutes a solution:
•
He takes 3 mL of a 0.5 g/L solution;
•
He adds 12 mL of water.
solution
water
What is the final concentration of this solution?
Show all your work in your Answer Booklet.
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Kativik School Board 2010
556-470 – Physical Science 416
25
Bellow are two solutions:
•
A solution with a pH of 4.5
•
A solution with a pH of 7.1
You are given the following two indicators:
INDICATOR
TURNING POINT
COLOUR CHANGE
1
3.0 – 4.4
Red – Yellow
2
6.0 – 7.6
Yellow – Blue
You want to find which solution has a pH of 4.5 and which solution
has a pH of 7.1. You can use only one indicator.
In your Answer Booklet, indentify the indicator (only one) that will
enable you to determine the pH of each of the two solutions.
Then, in your Answer Booklet, explain your choice.
Good luck!
Use the remaining time to revise your answers!
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Kativik School Board 2010
556-470 – Physical Science 416
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Kativik School Board 2010
556-470 – Physical Science 416