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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 Stage 8 Comprehensive Review — Quiz

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  • Questions count: 50
  • Passing grade: B+
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1.
True or false? Gold displaces copper.
True
False
2.
True or false? Rutherford discovered the nucleus.
True
False
3.
Which statement is correct?
Metal + acid gives oxygen.
Nucleon number = protons + neutrons.
Gold displaces copper.
Neutrons are positive.
4.
Which term matches this definition? “Metals from most to least reactive.”
Hydrogen
Magnesium sulfate
Reactivity series
Salt
5.
True or false? Combustion is exothermic.
True
False
6.
Nucleon number 23, protons 11. Neutrons?
23
12
11
34
7.
What is the charge on a proton?
+2
0
−1
+1
8.
Which statement is correct?
Neutrons are positive.
Combustion takes in heat.
Metal + acid → salt + hydrogen.
Diluting increases concentration.
9.
Spot 3 cm, front 10 cm. Rf?
30.00
0.30
7.00
3.33
10.
Which is the correct definition of “Displacement”?
Metals listed from most to least reactive.
Separating dissolved substances on paper.
More reactive metal replaces a less reactive one.
Group 1 metal that reacts vigorously with water.
11.
True or false? Protons and neutrons are in the nucleus.
True
False
12.
Lead is dense and ____.
light
toxic
reactive
edible
13.
In a neutral atom, the number of electrons equals the number of:
Neutrons
Protons
Shells
Nucleons
14.
True or false? Start lines are drawn in ink.
True
False
15.
Which is the correct definition of “Chromatography”?
White powder from burning magnesium.
Metal reacting slowly with air or water.
Colour of the potassium flame.
Separating dissolved substances on paper.
16.
The chromatogram data give an Rf for dye X. Which is the Rf value?
Dr Dabour Hub Academy - figure 1
0.4
0.6
2.8
1.7
17.
Which term matches this definition? “Mass dissolving in 100 g of water.”
Vigorous
Lilac
Solubility
Concentration
18.
Which term matches this definition? “Neutral particle in the nucleus.”
Neutron
Copper oxide
Unreactive metal
Effervescence
19.
Rf = spot distance ÷ ____.
time
start line
solvent front
paper length
20.
Hydrogen made by metals in acid in 1 minute. Which has the greatest value?
Dr Dabour Hub Academy - figure 2
Zinc
Lead
Iron
Magnesium
21.
Energy = 4.2 × 50 g × 10 °C?
42 J
500 J
2100 J
210 J
22.
Metal + water → metal hydroxide + ____.
oxygen
CO2
salt
hydrogen
23.
Nucleon number 35, protons 11. Neutrons?
24
46
35
11
24.
Which statement is NOT correct?
Metal + acid → salt + hydrogen.
Copper cannot displace zinc.
Thomson discovered the electron.
Start lines are drawn in ink.
25.
Which statement is NOT correct?
Protons and neutrons are in the nucleus.
Rutherford discovered the nucleus.
Thomson discovered the electron.
Chlorine adds bacteria.
26.
Which term matches this definition? “More reactive metal replaces a less reactive one.”
Extraction
Lead
Displacement
Squeaky pop
27.
Breaking bonds ____ energy.
creates
needs
destroys
releases
28.
Which statement is correct?
Metal + water → metal hydroxide + hydrogen.
Electrons are in the nucleus.
Diluting increases concentration.
Combustion takes in heat.
29.
Which statement is NOT correct?
Chlorine is added to water to kill microorganisms.
Fat has more energy per gram than carbohydrate.
Breaking bonds needs energy.
Mixtures have sharp melting points.
30.
Which statement is NOT correct?
Distillation separates water from salt.
Neutrons are positive.
Solubility of most solids increases with temperature.
Potassium is more reactive than magnesium.
31.
True or false? Breaking bonds needs energy.
True
False
32.
Solubility is the mass dissolving in ____ g of solvent.
100
1
10
1000
33.
Solubility of potassium nitrate. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 3
A
B
C
D
34.
Solubility of potassium nitrate. Calculate the percentage change in "Solubility (g/100 g)" from 0 to 80.
Dr Dabour Hub Academy - figure 4
92%
1300%
−1200%
1200%
35.
Nucleon number 23, protons 13. Neutrons?
13
10
36
23
36.
Hydrogen made by metals in acid in 1 minute. What is the value for Lead?
Dr Dabour Hub Academy - figure 5
60
2
12
28
37.
True or false? Diluting increases concentration.
True
False
38.
A saturated solution dissolves ____ solute.
unlimited
only gas
no more
more
39.
Which is the correct definition of “Proton”?
Positive particle in the nucleus.
Radiation shielded by dense lead.
Salt from magnesium and sulfuric acid.
Compound formed from an acid.
40.
Copper ____ displace zinc.
can
cannot
quickly
always
41.
True or false? Metal + acid gives oxygen.
True
False
42.
Which term matches this definition? “Negative particle in shells.”
Copper
Magnesium oxide
Electron
Proton
43.
Nucleon number 23, protons 17. Neutrons?
17
40
23
6
44.
Thomson discovered the ____.
electron
proton
neutron
nucleus
45.
A pure substance melts:
Over a range
At 0 °C always
Never
At one sharp temperature
46.
Which is the correct definition of “Electron”?
Breaking down with heat.
Gas made by metals with water or acids.
Malleable, unreactive conductor used for pipes.
Negative particle in shells.
47.
Solubility 32 g/100 g. Max mass in 50 g?
82 g
16 g
1600 g
160 g
48.
Energy = 4.2 × 100 g × 25 °C?
2500 J
10,500 J
420 J
105 J
49.
Which method separates insoluble solids from liquids?
Evaporation
Filtration
Distillation
Chromatography
50.
Temperature rise of 100 g water from 1 g of fuel. Which has the greatest value?
Dr Dabour Hub Academy - figure 6
Ethanol
Butanol
Propanol
Methanol
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Part of Chapter 9: Chemical Reactions 2 — see every lesson and quiz in this unit.
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