Council for Mineral Technology
Specialists in mineral and
metallurgical technology
MINQUIZ 2010
PROVINCIAL COMPETITION
ORAL QUIZ
16 JULY 2010
Copyright © Mintek 2010
PRACTICE
QUESTION
Copyright © Mintek 2010
PRACTICE QUESTION
1.
Water freezes at 0°Celsius. At how many
degrees Fahrenheit does water freeze?
A
B
C
D
50
32
45
63
Copyright © Mintek 2010
GOLD
Copyright © Mintek 2010
1.
GOLD
If a stone of mass m falls freely through a
vertical distance h, its kinetic energy gained
will be ...
A
B
C
D
mh
½mh
½ m h2
mgh
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2.
GOLD
When monochromatic light is totally
reflected by a mirror, which of the properties
of the light stays the same after reflection?
A
B
C
D
Speed only
Frequency only
Speed, frequency and photon energy
Speed and frequency
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3.
GOLD
An oxidising agent …
A
B
C
D
accepts electrons
donates electrons
accepts protons
donates protons
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4.
A
B
C
D
GOLD
X and Y are isolated spherical conductors
carrying unknown charges. The two attract
each other. Which of the following
situations is not possible?
X is neutral and Y is charged
X is charged and Y is neutral
X is negative and Y is positive
X and Y are both positive
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5.
A
B
C
D
GOLD
A set of Christmas tree lights consists of 20
identical globes connected in series. The set
is connected to a 240 V source. Calculate
the potential difference across each globe.
12 V
4 800 V
240 V
20 V
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6.
GOLD
In a vacuum all electromagnetic waves have
the same …
A
B
C
D
frequency
speed
wavelength
energy
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7.
GOLD
Which of the following compounds does not
contain either a double or a triple bond?
A
B
C
D
N2
C2H2
H2O
CH3CHCH2
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8.
GOLD
In which of the following molecules is the
covalent bond most polar?
A
B
C
D
H2S
HI
HCℓ
Cℓ2
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9.
GOLD
A solution of which the concentration is
accurately known is …
A
B
C
D
a standard solution
a normal solution
a neutral solution
a saturated solution
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GOLD
10. Of the equations below, which one is a
chemical reaction?
A
B
C
D
H2O(ℓ) → H2O(g)
CO2(g) + H2O(ℓ) → H2CO3(aq)
I2(s) → I2(g)
CO2(g) + O2(g) → O2(g) + CO2(g)
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1
2
GOLD
11. A(3;6), B(1;2) and C(7;4) are vertices of
triangle ABC. Determine the equation of the
altitude from A to BC in the form y = mx + c.
A
B
C
D
y = -2x + 4
y = 2x + 4
y = -3x + 15
y = - 2x - 5
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GOLD
12. Determine the minimum value of the
function y = 3 sin 2x – 4.
A
B
C
D
-7
-2
-1
3
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GOLD
13. If f (x) = sin bx and f (x) passes through
(45°; 1) determine b.
A
B
C
D
1
2
3
-3
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GOLD
14. Simplify: 4(3x – (5 – 3y + 5x) + 7y)
A
B
C
D
34x + 16y - 91
-8x + 40y - 20
40x + 76y - 77
None of the above
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3
4
15.
A
B
GOLD
x
81 = 27, find the value of x.
3
2
3
4
C
1
D
4
3
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GOLD
16. Find the root of p7 + 128 = 0.
A
B
C
D
3
2
-3
-2
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GOLD
17. Determine the equation of the asymptote of
the graph y = 5(x + 2) – 3.
A
B
C
D
y = -3
y=3
x = -3
x=2
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GOLD
18. What number comes next in the series?
9; 5; 8; 14; 10; 13
A
B
C
D
7
9
16
19
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GOLD
19. If (a – 7)(b + 11) = 0, solve for b if a = 7.
A
B
C
D
-11
Any number
11
0
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GOLD
20. Determine the value of x in terms of p and q
if p(x – p) = q(x – q).
A
B
C
D
(q – p)
(p + q)
(p – q)
p2 – q2
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GOLD
21. What do you call the remains of the sun
after its nuclear reactions stop?
A
B
C
D
Neutron star
Pulsar
Black hole
White dwarf star
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GOLD
22. When exposed to solar ultraviolet radiation,
which vitamin is produced in our bodies?
A
B
C
D
Vitamin K
Vitamin A
Vitamin C
Vitamin D
Copyright © Mintek 2010
GOLD
23. Which metals are used in the aircraft
industry because of their low density and
high resistance to corrosion?
A
B
C
D
Aluminium and titanium
Cadmium and stainless steel
Zinc and tantalum
Thallium and chromium
Copyright © Mintek 2010
GOLD
24. The Earth’s crust and the air above are
made up of four separate parts which are
closely related and overlap each other.
Which part is inhabited by living things?
A
B
C
D
Lithosphere
Biosphere
Hydrosphere
Atmosphere
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GOLD
25. The catalyst used in the Macarthur-Forrest
Cyanide Process used for extracting gold
from low quality ore is…
A
B
C
D
zinc
platinum
copper
lime
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GOLD
26. Solder is an alloy of two metals used for
joining wires together. The two metals used
in solder are…
A
B
C
D
iron and carbon
nickel and chromium
nickel and copper
tin and lead
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GOLD
27. Vehicle bodies are dipped into a bath of
molten metal to form a protective layer
against rust. Which metal is used for this
protective layer?
A
B
C
D
Copper
Chromium
Zinc
Tin
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GOLD
28. What is the Earth’s surface area mostly
composed of?
A
B
C
D
Land
Mountain ranges
Water
Plains
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GOLD
29. Which one of the following salts gives a
basic solution when dissolved in water?
A
B
C
D
NaCℓ
K2SO4
CH3COONa
NH4Cℓ
Copyright © Mintek 2010
GOLD
30. The name of the layer of the Earth that
separates the crust from the core is the…
A
B
C
D
magma
lithosphere
asthenosphere
mantle
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END OF
STANDARD GOLD
QUESTIONS
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GOLD
TIE-BREAK
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1.
A
B
C
D
GOLD TIE BREAK
A passenger remains seated in a moving
taxi. The taxi stops suddenly and the
passenger is thrown forward. This best
illustrates…
Newton’s first law of motion
Newton’s second law of motion
Newton’s third law of motion
Newton’s universal gravitational law
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2.
GOLD TIE BREAK
A DC source should be used to …
A
B
C
D
obtain a changing magnetic field
operate a transformer
produce heat
charge a battery
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3.
GOLD TIE-BREAK
Determine the minimum value of A if
A = (x2 – 4x + 4) - 1
A
B
C
D
2
-2
1
-1
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4.
GOLD TIE-BREAK
Solve for x in the equation 4x2 + x - 3 = x.
A
±
B
3 or 1
C
3 or -1
D
±
3
2
3
2
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5.
GOLD TIE-BREAK
94% of the Earth’s crust is composed of
which of the following elements?
A
B
C
D
Oxygen, iron, lead and calcium
Oxygen, gold, copper and silicon
Oxygen, iron, silicon and magnesium
Oxygen, silicon, carbon and magnesium
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END OF GOLD
TIE-BREAK
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GOLD
TIE-BREAK
SUDDEN DEATH
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1.
A
B
C
D
GOLD TIE BREAK SUDDEN DEATH
Which statement is correct? Light waves of
different frequencies …
have the same speed in all circumstances
have different speeds in the same material
medium
have the same speed in the same material
medium
have different speeds in a vacuum
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2.
GOLD TIE BREAK SUDDEN DEATH
Bromine water is readily decolourised by …
A
B
C
D
ethene
methane
methanol
hydrogen
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3.
GOLD TIE BREAK SUDDEN DEATH
Which of the following molecules is not
polar?
A
B
C
D
H2O
HCℓ
HF
Cℓ2
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4.
A
B
C
D
GOLD TIE-BREAK SUDDEN DEATH
If y = ax and passes through (2; 5), with a > 0,
determine a.
5
5
2
10
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5.
GOLD TIE-BREAK SUDDEN DEATH
Determine 2 32 + 2 2 in simplest surd form.
A
B
C
D
4
3
2
5
2
2
2
2
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6.
GOLD TIE-BREAK SUDDEN DEATH
If 2; 3; 4; 6; 6; 9; 8; 12; x; y are given as a
sequence, determine x and y.
A
B
C
D
x = 14; y = 10
x = 10; y = 15
x = 13; y = 16
x = 15; y = 13
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7.
GOLD TIE-BREAK SUDDEN DEATH
The main South African coalfields are in…
A
B
C
D
Gauteng and the Free State
Mpumalanga and Northern KwaZulu-Natal
Northern Cape and North West
Limpopo and Mpumalanga
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8.
GOLD TIE-BREAK SUDDEN DEATH
As what rock is Marble classified?
A
B
C
D
Intrusive igneous rock
Extrusive igneous rock
Sedimentary rock
Metamorphic rock
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9.
GOLD TIE-BREAK SUDDEN DEATH
What instrument did Galileo improve apon?
A
B
C
D
Telescope
Magnifying glass
Microscope
Glasses
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GOLD TIE-BREAK SUDDEN DEATH
10. All of the following places have, or once
had, ruby mines, except:
A
B
C
D
South Africa
Sri Lanka
Thailand
Vietnam
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END OF GOLD
TIE-BREAK
SUDDEN DEATH
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PLATINUM
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1.
PLATINUM
In the circuit below, the internal resistance
of the battery is negligible. What will be the
effect on the voltmeter reading and the
ammeter reading, if switch S is closed?
A
V
R1
S
R2
Voltmeter
Ammeter
A.
Increases
Increases
B.
Increases
Stays the same
C. Stays the same
Increases
D. Stays the same
Stays the same
Copyright © Mintek 2010
2.
A
B
C
D
PLATINUM
Diffraction through a narrow slit is less for
blue light than for red light, because …
blue light has a shorter wavelength than red
light
blue light travels faster than red light
the refraction index of air is larger for red light
than for blue light
blue light has a lower frequency than red light
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3.
A
B
C
D
PLATINUM
The capacitance of a parallel plate capacitor
is 20 µF. If the area of the plates and the
distance between them are doubled, the
capacitance will …
stay the same
doubled
quadruple
halved
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4.
PLATINUM
When an electron and a proton are
accelerated from rest through the same
potential difference, they acquire the same…
A
B
C
D
velocity
momentum
acceleration
kinetic energy
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5.
PLATINUM
In Supermarkets lasers are used by barcode
scanners to identify products. The typical
laser used is …
A
B
C
D
carbon dioxide
ruby
helium-neon
microwaves
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6.
PLATINUM
How many carbon atoms are in 4methyloctane?
A
B
C
D
5
7
9
11
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7.
A
B
C
D
PLATINUM
When a few drops of bromothymol blue and
a small amount of ammonium chloride
crystals are added to water in a test-tube,
the water turns yellow. When ammonia gas
is bubbled through, the solution will …
turn blue
stay yellow
become colourless
turn a darker yellow
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8.
A
B
C
D
PLATINUM
When a few drops of concentrated
hydrochloric acid (HCl) are added to a
saturated sodium chloride (NaCl) solution,
…
sodium chloride is precipitated
hydrogen gas is produced
sodium hydroxide is produced
the pH of the solution increases
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9.
PLATINUM
Which one of the following is a salt of
sulphuric acid?
A
B
C
D
Table salt
Baking powder
Epsom salt
Washing soda
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PLATINUM
10. When the hydrogen carbonate ion reacts as
a base with the ammonium ion, its conjugate
acid is …
A
B
C
D
ammonia
the carbonate ion
the ammonium ion
hydrogen carbonate
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PLATINUM
11. Simplify the following:
(bx.c)by (bx ÷ by)
A
B
C
D
2
b .c y
x 2 y xy 2
b
.c
b2x.c
bxy – x + y . cy
x
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PLATINUM
12. What number comes next in the following
sequence?
2; -6; 18; -54
A
B
C
D
-216
-162
162
-612
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PLATINUM
13. Calculate the value of:
sin(180o + θ). sin2 45 o. tan 225 o
cos(90o - θ). sin 30o. cos 240o
A
B
C
D
-2
2
1
-1
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PLATINUM
14. If P = x2 – 6x + 12 calculate the maximum
1
value of R = x 2 - 6x + 12
A
21
B
1
3
C
3
D
1
12
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PLATINUM
15. A stone thrown vertically into the air
reaches a height of h metres after t seconds,
and
h = 120t – 16t2. Find the time taken by the
stone
to reach its maximum height.
3
A
34 s
B
1
72
C
60 s
D
0,27 s
s
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PLATINUM
16. Simplify: 81+2 n .16 1−n
4 n+1
A
B
C
D
64
32
16
4 + 22n
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PLATINUM
17. If A(2; 4) and B(5; 1) are given, determine the
length of AB.
A
18 units
B
0 units
C
12 units
D
16 units
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PLATINUM
18. Solve for x if 8.3x = 27.2x
A
2
3
B
2
C
3
2
D
3
Copyright © Mintek 2010
PLATINUM
3
19. If M − 1;  is the midpoint of A(− 3; y ) and
2

B( x; − 2) , determine x and y.
A
B
C
D
x = 0; y = 1
x = 2; y = 2
x = 1; y = 5
x = -1; y = 3
Copyright © Mintek 2010
PLATINUM
cos(180 + θ). sin 60 . tan 315
sin 90 . sin(90 + θ). cos 60
o
20. Simplify:
A
3
2
B
3
2
3
8
C
D
-1
Copyright © Mintek 2010
o
2
o
o
o
o
PLATINUM
21. Natural corundum is found in…
A
B
C
D
volcanic rocks
placer gem deposits
metamorphic rocks
all of the above
Copyright © Mintek 2010
PLATINUM
22. Basalt is a rock found in the Earth’s crust.
It’s mainly found in…
A
B
C
D
intrusive igneous rocks
extrusive igneous rocks
sedimentary rocks
metamorphic rocks
Copyright © Mintek 2010
PLATINUM
23. Which of the following combinations are
renewable energy resources?
A
B
C
D
Solar energy and fossil fuels
Natural gas and nuclear fuels
Biomass energy and wind energy
Ocean energy and coal
Copyright © Mintek 2010
PLATINUM
24. The Witwatersrand basin contains a
considerable portion of the world’s gold
reserves. Which of the following minerals
are also found in the Witwatersrand basin?
A
B
C
D
Uranium
Nickel
Vermiculite
Iron
Copyright © Mintek 2010
PLATINUM
25. Which element is mainly added to iron to
produce steel with great resistance to
pulling stresses such as that used in long
span bridges and bicycle chains?
A
B
C
D
Tungsten
Carbon
Nickel
Manganese
Copyright © Mintek 2010
PLATINUM
26. Impacts by large meteoritic projectiles
played a major role in shaping the surface of
the Earth. The oldest and largest visible
impact structure known on Earth was
declared a world heritage site in 2005, it is
the…
A
B
C
D
Pilanesberg complex
Tswaing
Plover’s Lake
Vredefort Dome
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PLATINUM
27. Why is phosphorus essential to life?
Phosphates are important components of …
A
B
C
D
DNA and RNA
proteins
disinfectant substances
the hormone thyroxine
Copyright © Mintek 2010
PLATINUM
28. When 4 mol hexane burns in excess oxygen,
how many moles of carbon dioxide are
produced?
A
B
C
D
4
12
20
24
Copyright © Mintek 2010
PLATINUM
29. Alluvial (placer) gem deposits are those in
which the gems are mined from:
A
B
C
D
hard rocks
gravel and / or sand
caves
pegmatites
Copyright © Mintek 2010
PLATINUM
30. What celestial objects can be seen with the
unaided eye during the daytime?
A
B
C
D
The sun
The moon and sun
The sun and Venus
The sun, moon and Venus
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END OF
STANDARD
PLATINUM
QUESTIONS
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PLATINUM
TIE-BREAK
Copyright © Mintek 2010
1.
PLATINUM TIE-BREAK
The force between two charged spheres is F
Newton. This force can be doubled by …
A
B
C
D
doubling the charge on one of the spheres
doubling the charge on both the spheres
halving the distance between the spheres
doubling the distance between the spheres
Copyright © Mintek 2010
2.
PLATINUM TIE-BREAK
Metals are good conductors of electricity,
because they possess …
A
B
C
D
vibrating atoms
high melting-points
free electrons
free ions
Copyright © Mintek 2010
3.
PLATINUM TIE-BREAK
Determine the abscissa value where the
minimum of (x2 – 4x + 4) – 1 occurs.
A
B
C
D
2
-1
1
-1
Copyright © Mintek 2010
4.
PLATINUM TIE-BREAK
Solve for x in the equation x -2 = 16.
1
4
A
B
±
1
4
C
4
D
±4
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5.
A
B
C
D
PLATINUM TIE-BREAK
The automobile industry makes use of
powerful lasers for computer controlled
cutting and welding on auto assembly lines.
The typical laser used is…
carbon dioxide
ruby
helium-neon
microwaves
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END OF PLATINUM
TIE-BREAK
Copyright © Mintek 2010
PLATINUM
TIE-BREAK
SUDDEN DEATH
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1.
A
B
C
D
PLATINUM TIE-BREAK SUDDEN DEATH
The volume of a fixed mass of gas is
reduced without a change in the
temperature. The gas pressure increases
because ...
the gas particles are now moving faster
the gas particles have increased in number
there is a greater distance separating the gas
particles
a greater number of collisions per unit time now
occurs against the container walls
Copyright © Mintek 2010
2.
PLATINUM TIE-BREAK SUDDEN DEATH
Which one of the following substances has
the highest pH?
A
B
C
D
household vinegar
lemon juice
pure water
ammonia solution
Copyright © Mintek 2010
3.
PLATINUM TIE-BREAK SUDDEN DEATH
Which of the following substances can form
an electrolyte?
A
B
C
D
PbCℓ2
CaSO4
KBr
Cu(OH)2
Copyright © Mintek 2010
4.
PLATINUM TIE-BREAK SUDDEN DEATH
Given four geometric shapes with the same
perimeter, which has the greatest area?
A
B
C
D
Square
Circle
Octogon
Ellipse
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5.
PLATINUM TIE-BREAK SUDDEN DEATH
Determine 72 + 2 2 in simplest surd form.
A
B
C
D
6
4
4
8
2
3
2
2
Copyright © Mintek 2010
6.
PLATINUM TIE-BREAK SUDDEN DEATH
If 3; 9; 17; 27; x; y are given as a sequence,
determine x and y.
A
B
C
D
x = 32; y = 43
x = 29; y = 34
x = 39; y = 53
x = 42; y = 54
Copyright © Mintek 2010
7.
PLATINUM TIE-BREAK SUDDEN DEATH
Ammonium salts are important to plants
because they are a source of …
A
B
C
D
nitrogen
potassium
chlorine
phosphorus
Copyright © Mintek 2010
8.
A
B
C
D
PLATINUM TIE-BREAK SUDDEN DEATH
During the 18th century a large pipe
containing rich metal ores were found at
what is known today as Phalaborwa. The
pipe was formed as a result of…
volcanic eruptions
fossilised remains of plants and animals
earthquakes
a prehistoric lake
Copyright © Mintek 2010
9.
A
B
C
D
PLATINUM TIE-BREAK SUDDEN DEATH
Which element is mainly added to iron to
increase the strength of iron and form the
alloy steel? This alloy is used in motor
vehicle bodies, appliances, containers, etc.
Chromium
Carbon
Copper
Magnesium
Copyright © Mintek 2010
PLATINUM TIE-BREAK SUDDEN DEATH
10. What is the formula of iron(III)oxide?
A
B
C
D
FeO
Fe3O
Fe3O2
Fe2O3
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THE END!
Copyright © Mintek 2010