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Course: Alhussan Chemistry — Stage 7
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Alhussan Chemistry — Stage 7

Chapter 1: The Particle Model and States of Matter

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Chapter 2: Elements, Compounds and Mixtures

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Chapter 3: Metals and Non-Metals

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Chapter 4: Chemical Reactions 1

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Chapter 5: Acids and Alkalis

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Chapter 6: The Earth and Plate Tectonics

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Quiz

Chemistry 3.3 Amazing alloys — Quiz

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  • Questions count: 50
  • Passing grade: B+
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1.
Hardness of copper and its alloys. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 1
A
B
C
D
2.
Hardness of copper and its alloys. About how many times bigger is Bronze than Copper?
Dr Dabour Hub Academy - figure 2
4.2
5.6
2.8
1.4
3.
Brass is 70% copper. Mass of zinc in 250 g?
17,500 g
75 g
175 g
4 g
4.
Hardness of copper and its alloys. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 3
A
B
C
D
5.
Brass is 60% copper. Mass of zinc in 250 g?
4 g
150 g
15,000 g
100 g
6.
Which term matches this definition? “Alloy of copper and tin.”
Toughness
Copper
Titanium
Bronze
7.
Which statement is NOT correct?
Pure aluminium is light but not strong.
This makes alloys harder.
Stainless steel does not rust.
Pure metals are harder than alloys.
8.
Which statement is NOT correct?
Steel is iron mixed with carbon.
Alloys are made by melting metals together.
Stainless steel rusts easily.
Brass is copper and zinc.
9.
Which statement is NOT correct?
Steel is iron mixed with carbon.
Alloys are made by melting metals together.
Alloys are compounds.
Lighter aeroplanes burn less fuel.
10.
A ring is 9-carat gold and has mass 4 g. Mass of gold? (24 carat = pure)
36.00 g
2.50 g
1.50 g
0.44 g
11.
Strength of steel with different carbon content. What is the value of "Strength (relative)" when "Carbon (%)" is 0.2?
Dr Dabour Hub Academy - figure 4
183
91
163
133
12.
Which term matches this definition? “A mixture of a metal with other elements, made by melting them together.”
Alloy
Ore
Element
Compound
13.
Brass is 65% copper. Mass of zinc in 250 g?
88 g
162 g
16,250 g
4 g
14.
Hardness of copper and its alloys. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 5
A
B
C
D
15.
Which term matches this definition? “Alloy of copper and zinc.”
Brass
Stiffness
Noble gas
Bronze
16.
Alloy 7075 is about 90% aluminium. What mass of aluminium is in 250 kg of the alloy?
3 kg
160 kg
225 kg
22,500 kg
17.
A ring is 18-carat gold and has mass 4 g. Mass of gold? (24 carat = pure)
3.00 g
0.22 g
1.00 g
72.00 g
18.
Which statement is correct?
Stainless steel does not rust.
Brass is copper and tin.
Bronze is used in electrical wires.
24-carat gold is an alloy.
19.
A ring is 18-carat gold and has mass 8 g. Mass of gold? (24 carat = pure)
144.00 g
0.44 g
2.00 g
6.00 g
20.
Strength of steel with different carbon content. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 6
A
B
C
D
21.
In the diagram, which arrangement has layers that slide most easily?
Dr Dabour Hub Academy - figure 7
Pure metal
Non-metal (gas)
All equally
Alloy
22.
Composition of stainless steel (%). About how many times bigger is Iron than Nickel?
Dr Dabour Hub Academy - figure 8
13.9
18.5
4.6
9.2
23.
Hardness rose from 50 (copper) to 100 (bronze). Calculate the percentage increase.
50%
1000%
200%
100%
24.
Hardness of copper and its alloys. What is the total of all the values?
Dr Dabour Hub Academy - figure 9
234
261
288
114
25.
Strength of steel with different carbon content. Calculate the percentage change in "Strength (relative)" from 0 to 1.0.
Dr Dabour Hub Academy - figure 10
201%
50%
101%
−101%
26.
Which term matches this definition? “Alloy of iron and carbon.”
Density
Diamond
Steel
Metal lattice
27.
Hardness of copper and its alloys. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 11
A
B
C
D
28.
Which is the correct definition of “Duralumin”?
Strong, light aluminium alloy used in aircraft.
Alloy containing mercury.
Electrons free to move through a metal.
How much force a material withstands before breaking.
29.
Which statement is correct?
Brass is copper and tin.
Stainless steel rusts easily.
24-carat gold is an alloy.
Lighter aeroplanes burn less fuel.
30.
Which statement is correct?
Bronze is used in electrical wires.
Alloys are compounds.
Alloy atoms are all the same size.
Stainless steel contains chromium.
31.
Which is the correct definition of “Amalgam”?
Small group of atoms joined together.
Resistance to cracking under impact.
Alloy of iron and carbon.
Alloy containing mercury.
32.
Which statement is correct?
Proportions in an alloy can vary.
Stainless steel rusts easily.
Alloy atoms are all the same size.
Pure aluminium is very strong.
33.
Which term matches this definition? “Alloy that is 75% gold.”
Mercury
Non-metal
Density
18-carat gold
34.
Brass is 70% copper. Mass of zinc in 100 g?
300 g
30 g
70 g
7000 g
35.
Lighter aeroplanes burn less ____.
metal
fuel
air
water
36.
The Bronze Age came before the ____ Age.
Stone
Gold
Iron
Copper
37.
Stainless steel contains ____.
copper
sodium
mercury
chromium
38.
Bronze is copper and ____.
carbon
zinc
tin
iron
39.
An alloy is a ____.
molecule
compound
mixture
element
40.
18-carat gold is ____% gold.
100
75
50
18
41.
Steel is iron mixed with ____.
zinc
tin
copper
carbon
42.
Alloys are made by melting metals ____.
apart
in water
together
in acid
43.
True or false? Alloy atoms are all the same size.
True
False
44.
True or false? An alloy is a mixture.
True
False
45.
True or false? Brass is used for musical instruments.
True
False
46.
True or false? Duralumin (aluminium with copper) is used in aircraft.
True
False
47.
True or false? 24-carat gold is an alloy.
True
False
48.
True or false? Different-sized atoms in an alloy stop layers sliding.
True
False
49.
True or false? Pure iron is soft and rusts.
True
False
50.
True or false? Lighter aeroplanes burn less fuel.
True
False
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Part of Chapter 3: Metals and Non-Metals — see every lesson and quiz in this unit.
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