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Course: Alhussan Chemistry — Stage 8
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Alhussan Chemistry — Stage 8

Chapter 7: Inside Atoms

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Chapter 8: Pure Substances and Solutions

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Chapter 9: Chemical Reactions 2

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Quiz

Chemistry 9.1 More chemical reactions — Quiz

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  • Questions count: 50
  • Passing grade: B+
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1.
Combustion uses ____.
nitrogen
helium
oxygen
argon
2.
Which term matches this definition? “A substance gaining oxygen.”
Endothermic
Oxidation
Joule
Carbon dioxide
3.
Which is the correct definition of “Quicklime”?
Means "reacts to make" in an equation.
Product of acid with metal, base or carbonate.
Calcium oxide from heating limestone.
Releases energy (exothermic).
4.
Mass of magnesium during burning. What is the value of "Mass (g)" when "Time (min)" is 3?
Dr Dabour Hub Academy - figure 1
3.1
4.0
2.4
3.6
5.
Time for limewater to turn milky from heated carbonates. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 2
A
B
C
D
6.
Which statement is correct?
Methane burns to make hydrogen.
Heating copper carbonate gives copper metal.
Oxidation means gaining oxygen.
Carbonates gain mass when heated.
7.
True or false? Carbon + oxygen → carbon dioxide.
True
False
8.
In a reaction, the number of atoms of each element does not ____.
disappear
change
matter
double
9.
Which is the correct definition of “Limestone”?
Alcohol fuel used in spirit burners.
Gas made when metals react with acids.
A substance gaining oxygen.
Rock of calcium carbonate.
10.
Mass fell from 10.0 to 6.4 g. Percentage lost?
36%
64%
4%
56%
11.
12.4 g of carbonate gave 8.0 g of oxide. Mass of CO2 lost?
20.4 g
12.4 g
8.0 g
4.4 g
12.
True or false? You cannot usually get the reactants back.
True
False
13.
True or false? Atoms are lost in combustion.
True
False
14.
Mass of copper carbonate during heating. Between which two values of "Time (min)" did "Mass (g)" change the most?
Dr Dabour Hub Academy - figure 3
0 and 1
3 and 4
2 and 3
1 and 2
15.
Which statement is correct?
Oxidation means losing oxygen.
Fuels containing hydrogen produce water when burnt.
Limestone decomposes to sand.
Atoms are lost in combustion.
16.
Which term matches this definition? “Breaking down a compound using heat.”
Oxidation
Reactant
Endothermic
Thermal decomposition
17.
5.0 g of carbonate gave 3.2 g of oxide. Mass of CO2 lost?
3.2 g
8.2 g
1.8 g
5.0 g
18.
Carbon monoxide made with different air supply. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 4
A
B
C
D
19.
How does acid rain affect carrot crops?
It damages the waxy coating on leaves and slows growth
It has no effect
It turns them blue
It makes them grow faster
20.
Which is the correct definition of “Carbon dioxide”?
Error that shifts all results the same way.
Container used to hold water above a burner.
Burning with too little oxygen, making carbon monoxide.
Gas from combustion and decomposition.
21.
True or false? Too little oxygen gives toxic carbon monoxide.
True
False
22.
Time for limewater to turn milky from heated carbonates. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 5
A
B
C
D
23.
Mass of copper carbonate during heating. By how much does "Mass (g)" change between 0 and 5?
Dr Dabour Hub Academy - figure 6
2.8
1.8
8.2
3.2
24.
Which is the correct definition of “Carbon monoxide”?
Apparatus for measuring energy.
Alcohol fuel used in spirit burners.
Container used to hold water above a burner.
Toxic gas from incomplete combustion.
25.
True or false? Methane burns to make hydrogen.
True
False
26.
Carbon monoxide made with different air supply. Which has the smallest value?
Dr Dabour Hub Academy - figure 7
Open
Quarter
Half
Closed
27.
Mass fell from 5.0 to 5.6 g. Percentage lost?
112%
−1%
−12%
−11%
28.
Carbon monoxide made with different air supply. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 8
A
B
C
D
29.
Which statement is NOT correct?
Methane burns to make hydrogen.
Thermal decomposition uses heat to break a compound.
Carbon monoxide detectors protect against poisoning.
Burning magnesium gains mass.
30.
Copper carbonate turns from green to ____ when heated.
red
white
blue
black
31.
In reactions atoms ____.
rearrange
disappear
grow
split forever
32.
5.0 g of carbonate gave 5.6 g of oxide. Mass of CO2 lost?
10.6 g
−0.6 g
5.6 g
5.0 g
33.
Which statement is NOT correct?
Heating copper carbonate gives copper metal.
Oxidation means gaining oxygen.
Calcium carbonate → calcium oxide + carbon dioxide.
Copper carbonate turns from green to black when heated.
34.
The number of atoms of each element ____.
does not change
doubles
halves
disappears
35.
True or false? Decomposition uses cold.
True
False
36.
True or false? Combustion takes in heat.
True
False
37.
Mass from air counts as a ____.
solvent
product
catalyst
reactant
38.
Which is the correct definition of “Irreversible”?
Starting substance, written on the left.
Cannot easily get reactants back.
Error that shifts all results the same way.
Salt from nitric acid.
39.
Time for limewater to turn milky from heated carbonates. What is the value for Magnesium?
Dr Dabour Hub Academy - figure 9
223
16
38
73
40.
Oxidation means gaining ____.
mass only
hydrogen
oxygen
electrons only
41.
Decomposition products are ____ substances.
more complex
identical
larger
simpler
42.
10.0 g of carbonate gave 3.2 g of oxide. Mass of CO2 lost?
10.0 g
6.8 g
13.2 g
3.2 g
43.
Calcium carbonate → calcium oxide + ____.
oxygen
carbon dioxide
water
hydrogen
44.
Mass of magnesium during burning. Which statement best describes the pattern?
Dr Dabour Hub Academy - figure 10
"Mass (g)" decreases as "Time (min)" increases
"Mass (g)" stays the same
"Mass (g)" increases as "Time (min)" increases
"Mass (g)" rises to a peak at 3, then falls
45.
Time for limewater to turn milky from heated carbonates. Which has the greatest value?
Dr Dabour Hub Academy - figure 11
Copper
Calcium
Magnesium
Zinc
46.
True or false? Oxidation means losing oxygen.
True
False
47.
Which statement is NOT correct?
Carbon monoxide detectors protect against poisoning.
Limestone decomposes to sand.
Burning magnesium gains mass.
Too little oxygen gives toxic carbon monoxide.
48.
Carbon monoxide made with different air supply. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 12
A
B
C
D
49.
Which term matches this definition? “Cannot easily get reactants back.”
Carbon monoxide
Endothermic
Combustion
Irreversible
50.
True or false? Oxidation means gaining oxygen.
True
False
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Part of Chapter 9: Chemical Reactions 2 — see every lesson and quiz in this unit.
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