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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 3.2 Comparing conductors — Quiz

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  • Questions count: 50
  • Passing grade: B+
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1.
Heat travels 15 cm along a rod in 40 s. What is the mean rate?
0.38 cm/s
2.67 cm/s
600.00 cm/s
55.00 cm/s
2.
Time for wax to melt on rods of different materials. Which has the smallest value?
Dr Dabour Hub Academy - figure 1
Copper
Iron
Glass
Aluminium
3.
Which must be the same for each strip in a fair test?
Colour of strip
Size of strip and mass of wax
Type of metal
Time taken
4.
Which term matches this definition? “A form of carbon that conducts electricity.”
Graphite
Electric current
Delocalised electrons
Corrosion resistance
5.
Temperature of a processor with and without heat sink. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 2
A
B
C
D
6.
Free electrons carry ____ through metals.
charge
sound
mass
light
7.
True or false? If a bulb lights, the material is a conductor.
True
False
8.
True or false? Conductors can be tested in a circuit with a bulb.
True
False
9.
True or false? Graphite is a metal.
True
False
10.
Which statement is correct?
Metals have no free electrons.
Most non-metals are poor conductors.
Diamond conducts electricity.
Pan handles are made of copper.
11.
Time for wax to melt on rods of different materials. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 3
A
B
C
D
12.
Which statement is NOT correct?
Air is a good thermal insulator.
Diamond conducts electricity.
Diamond is a poor electrical conductor.
Aluminium is used in power lines.
13.
True or false? Electrical conductors let electric current flow.
True
False
14.
Which is the correct definition of “Thermal conductor”?
Transfers thermal energy well.
Forces between molecules that are easily overcome.
Line separating metals and non-metals in the periodic table.
Element, usually dull and a poor conductor.
15.
Time for wax to melt on rods of different materials. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 4
A
B
C
D
16.
True or false? Non-metals are good conductors.
True
False
17.
Which statement is NOT correct?
Graphite is a metal.
If a bulb lights, the material is a conductor.
Electrical conductors let electric current flow.
Plastic covers wires because it is an insulator.
18.
True or false? Graphite is a non-metal that conducts electricity.
True
False
19.
True or false? Air is a good thermal conductor.
True
False
20.
Heat travels 10 cm along a rod in 20 s. What is the mean rate?
0.50 cm/s
2.00 cm/s
200.00 cm/s
30.00 cm/s
21.
True or false? If a bulb lights, the material is an insulator.
True
False
22.
A heat sink lowered temperature from 80 °C to 50 °C. Calculate the percentage decrease.
60.0%
37.5%
62.5%
30.0%
23.
Wax melted after 25 s on copper and 100 s on iron. How many times faster on copper?
4.0 times
125.0 times
75.0 times
0.2 times
24.
A processor rose from 35 °C to 78 °C. Calculate the percentage increase.
43%
55%
123%
223%
25.
A processor rose from 30 °C to 70 °C. Calculate the percentage increase.
57%
233%
133%
40%
26.
Time for wax to melt on rods of different materials. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 5
A
B
C
D
27.
A heat sink lowered temperature from 90 °C to 55 °C. Calculate the percentage decrease.
35.0%
38.9%
61.1%
63.6%
28.
True or false? In a fair test only one variable is changed.
True
False
29.
A processor rose from 30 °C to 82 °C. Calculate the percentage increase.
273%
52%
63%
173%
30.
Which term matches this definition? “A material that is a poor conductor.”
Insulator
Diamond
Electrical conductor
Noble gas
31.
Temperature of a processor with and without heat sink. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 6
A
B
C
D
32.
Relative electrical conductivity. What is the total of all the values?
Dr Dabour Hub Academy - figure 7
307
377
342
100
33.
Which statement is NOT correct?
Plastic conducts electricity.
Most non-metals are poor conductors.
A metal spoon in hot tea gets hot quickly.
Conductors can be tested in a circuit with a bulb.
34.
True or false? Plastic conducts electricity.
True
False
35.
Wax melted after 20 s on copper and 100 s on iron. How many times faster on copper?
120.0 times
5.0 times
80.0 times
0.2 times
36.
True or false? Pan handles are made of copper.
True
False
37.
Time for the pin to drop off strips of four metals. Which bar chart is correct?
Dr Dabour Hub Academy - figure 8
A
B
C
D
38.
Time for wax to melt on rods of different materials. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 9
A
B
C
D
39.
Wax melted after 20 s on copper and 80 s on iron. How many times faster on copper?
0.2 times
4.0 times
100.0 times
60.0 times
40.
Most metals are ____ conductors.
no
poor
good
weak
41.
Copper conductivity is 95% of silver's. If silver is 63, what is copper?
0.7
−32.0
59.8
5985.0
42.
Which statement is correct?
Diamond conducts electricity.
Pan handles are made of copper.
Free electrons carry charge through metals.
If a bulb lights, the material is an insulator.
43.
Which term matches this definition? “Flow of charge.”
Malleable
Sonorous
Electric current
Alloy
44.
Which is the correct definition of “Copper”?
How well a material resists reacting with air and water.
The only metal that is liquid at room temperature.
Metal used for wires; second-best conductor.
Light, corrosion-resistant frame material.
45.
Which statement is correct?
Non-metals are good conductors.
Thermal conductors transfer thermal energy well.
Pan handles are made of copper.
Air is a good thermal conductor.
46.
Heat travels 15 cm along a rod in 30 s. What is the mean rate?
0.50 cm/s
2.00 cm/s
45.00 cm/s
450.00 cm/s
47.
Which statement is correct?
Non-metals are good conductors.
Copper is used in wires because it is a good conductor and cheaper than silver.
Copper is the best conductor.
Pan handles are made of copper.
48.
Thermal conductors transfer ____ well.
mass
thermal energy
light
sound
49.
The best conductor is ____.
gold
copper
iron
silver
50.
A heat sink lowered temperature from 90 °C to 60 °C. Calculate the percentage decrease.
33.3%
50.0%
66.7%
30.0%
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Part of Chapter 3: Metals and Non-Metals — see every lesson and quiz in this unit.
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