Free Printable KS3 Chemistry Quiz

1.

How many atoms of oxygen are there in water? H₂O

a)

1

b)

2

c)

0

2.

How many atoms of sulphur are in sulphuric acid? H₂SO₄

a)

6

b)

2

c)

4

d)

1

3.

How many atoms are there all together in HCl?

a)

1

b)

2

c)

3

4.

What are the different elements in carbon dioxide?

a)

carbon

b)

cobalt and oxygen

c)

oxygen and carbon

d)

oxide and carbon

5.

How many atoms are there all together in Magnesium hydroxide? Mg(OH)₂

a)

3

b)

5

c)

2

6.

How many different elements make up nitric acid? HNO₃

a)

1

b)

5

c)

3

7.

How many atoms in total are there in nitric acid? HNO₃

a)

3

b)

6

c)

5

8.

What elements make up Copper sulphate? CuSO₄

a)

copper, sulphate

b)

copper, sulphur

c)

copper, sulphur and oxygen

d)

copper and oxygen

9.

What is the correct chemical formula for water?

a)

H2O

b)

HO2

c)

H₂O

d)

H²O

10.

How many atoms of hydrogen are in ethanol? C₂H₅OH

a)

5

b)

2

c)

6

d)

9

11.

A change in which atoms are rearranged to create new substances.
New are made substances made.
Energy transferred to or from surroundings.

a)

Physical change

b)

Catalysts

c)

Reversible

d)

Chemical reaction

12.

Most chemical reactions are not reversible, a few are. This is called.....

a)

Physical change

b)

Catalysts

c)

Reversible

d)

Chemical reaction

13.

Not used up in a reaction.
Speeds up a slow reaction.

a)

Physical change

b)

Catalysts

c)

Reversible

d)

Chemical reaction

14.

Different reactions need different

a)

Physical change

b)

Catalysts

c)

Reversible

d)

Chemical reaction

15.

A change that is reversible.
New substances are not made.

a)

Physical change

b)

Catalysts

c)

Reversible

d)

Chemical reaction

16.

Which of these is NOT a useful chemical reaction?

a)

Medicines

b)

Condensation

c)

Fabrics

d)

Building materials

17.

A starting substance in a chemical reaction.
Must be kept to the LEFT of the arrow.

a)

Products

b)

Produts

c)

Reactants

d)

Reatants

18.

Products

a)

A starting substance in a chemical reaction.
Must be kept to the LEFT of the arrow.

b)

A substance that is made in a chemical reaction.
Must be kept to the RIGHT of the arrow.

19.

Charcoal

a)

form of chloride

b)

form of calcuim

c)

form of chlorine

d)

form of carbon

20.

Iron + sulfur -->

a)

Iron sulphate

b)

Iron sulphide

21.

"ate" at the end of a compound tells you that which element is present?

a)

Oxygen

b)

Hydrogen

c)

Water

d)

Carbon

22.

Which is correct?

a)

Hazard - The chance of damage or injury from a hazard.
Risk - A possible source of danger.

b)

Hazard -A possible source of danger.
Risk - The chance of damage or injury from a hazard.

23.

Magnesium + Oxygen -->

a)

Magnesium oxide

b)

Magnesium + Oxygen

c)

MgO

d)

2MgO

24.

A material that burns to transfer useful energy

a)

Combustion

b)

Fuel

25.

A chemical reaction in which a substance reacts quickly with oxygen

a)

Combustion

b)

Fuel

26.

Carbon dioxide and water is produced from.....

a)

Methane burning

b)

Methane in a tank

c)

Methane reacting with oxygen

d)

Methane reacting with hydrogen

27.

Spot the odd one out!

a)

Food

b)

Fossil fuels

c)

A fuel made from the remains of animals and plants that died millions of years ago.

d)

Coal
Oil
Natural gas

28.

Some fuels will one day run out.
They take millions of years to form.

a)

Renewable

b)

Non-renewable

29.

Fuel with one carbon atom and four hydrogen atoms.

a)

Water

b)

Methane

c)

Oxygen

d)

Carbon dioxide

30.

Which statement is not correct?

a)

Decomposition - A chemical reaction in which a compound breaks down.
Simpler compounds and/or elements formed.

b)

Thermal decomposition - When a substance breaks down on heating

c)

Discrete variable - A variable that can have any number values

d)

Exothermic change - Transfers energy to the surroundings.

31.

Transfers energy from the surroundings.
Temperature of the reaction decreases (feels cooler)

a)

Endothermic change

b)

Exothermic change

32.

2Mg + O₂ -->

a)

MgO

b)

2MGO

c)

2MgO

d)

Magnesium oxide

33.

C + O₂ -->

a)

CO

b)

2CO

c)

CO₂

d)

2CO₂

34.

4H + O₂ --->

a)

H2O

b)

H₂O

c)

2H2O

d)

2H₂O

35.

The particles are arranged regularly and packed closely in a/an (choose all)

a)

solid

b)

liquid

c)

gas

36.

The temperature at which a liquid freezes is called as

(a)

37.

The particles in which of the three would have the highest kinetic energy? Choose one.

a)

solid

b)

liquid

c)

gas

38.

Choose all correct options:

a)

Evaporation occurs only at boiling point

b)

Boiling occurs only at boiling point

c)

There is no substance that can directly go from a solid to a gas

d)

The reverse of sublimation is deposition

39.

Dry ice is solid (choose one)

a)

CO₂

b)

He

c)

O₂

d)

N₂

40.

A substance whose boiling point is 50C is currently at 75C. Which state(s) could it be at? Choose all.

a)

solid

b)

liquid

c)

gas

41.

The spreading out of particles in a gas or liquid is known as

(a)

42.

If salt is dissolved in water, then (choose all):

a)

salt is the solute

b)

water is the solute

c)

salt is the solvent

d)

water is the solvent

e)

salt is the solution

43.

Assume that you want to dissolve salt in water and you've mixed as much as possible, but there is still some salt left. Which of the following would dissolve the salt? Choose one.

a)

Doing nothing

b)

Boiling the water

c)

Freezing it

d)

Drinking the water

44.

For which of the following temperatures in Celsius would the solubility of NaCl be the most? Choose one.

a)

-100

b)

30

c)

70

d)

100

45.

Given the below graph, if x axis is the temperature in C and y axis is the solubility/g per 100 g of water, what is the solubility at 40 C? Enter an integer from 0 to 100.

(a)

46.

Which of the following is/are compounds?

a)

H₂O

b)

silicon dioxide

c)

Mg (magnesium)

d)

diamond

47.

Sugar in water is a (choose one)

a)

element

b)

atom

c)

compound

d)

mixture

48.

Salt is often used to quickly melt frozen roads in cold temperatures. This means that (choose all)

a)

salt reduces the melting point of water

b)

salt increases the meting point of water

c)

salt reduces the boiling point of water

d)

salt increases the boiling point of water

49.

Which of the following can be separated by filtration? Choose all.

a)

salt and water

b)

oil and water

c)

sand and water

d)

water and air

50.

Rock salt is (choose one)

a)

pure salt

b)

impure salt

c)

fake salt

d)

liquid salt

51.

A mixture of ethanol and water is best separated by (choose one)

a)

fractional distillation

b)

paper chromatography

c)

crystallisation

d)

filteration

52.

Choose all correct options:

a)

The mass of a proton and neutron is the same

b)

Neutron has no charge

c)

The charge of an electron is negative

d)

1836 electrons weigh the same as a neutron

53.

Carbon-12, Carbon-13 and Carbon-14 are (choose one)

a)

isotopes

b)

isobars

c)

isoclines

d)

nullclines

54.

Chlorine naturally occurs in two isotopes, $\text{Cl}_{17}^{35}$ and $\text{Cl}_{17}^{37}$ . If a naturally occurring sample of chlorine has 75% of the isotope with smaller atomic mass, then the relative atomic mass of chlorine is
(Enter a number from 0.00 to 50.00)

(a)

55.

The mass number of Cobalt is 59. Then the number of protons of cobalt is (write a number from 1 to 50), if there are 32 neutrons,

(a)

56.

Given the chemical equation $C_{2\ }H_6+O_2\rightarrow CO_2+H_2O$ , if it is balanced as $aC_{2\ }H_6+bO_2\rightarrow\ xCO_2+yH_2O$ , then (choose all)

a)

$a=2$

b)

$b=3.5$

c)

$x=6$

d)

$y=5$

57.

In the balanced chemical equation $2K\left(s\right)+2H_2O\left(l\right)\rightarrow2KOH\left(aq\right)+H_2\left(g\right)$ , how many of them are gases? Enter a number from 1 to 100.

(a)

58.

How many $H^1$ atoms are required to have the same mass as one $C^{12}$ atom? Enter a number from 1 to 50.

(a)

59.

The (a) of an element is the weighted average mass of the isotopes of the element.

60.

The temperature at which a solid melts is called as

(a)

61.

Nitrogen is a gas at 25C. Then (choose all)

a)

Its melting point if it exists is < 25 C

b)

Its boiling point if it exists is < 25 C

c)

Its freezing point if it exists is < 25 C

d)

It is a liquid at 60 C.

62.

Which of the following does not exist? Choose all

a)

liquid oxygen

b)

liquid helium

c)

liquid water

d)

liquid carbon dioxide

63.

Let S be the solubility/g per 100 g of water for temperature t in Celsius. Which of the below equations cannot be the solubility curve for a solid? Choose all.

a)

$S=50+t$

b)

$S=2t-100$

c)

$S=50-t$

d)

$S=60$

64.

What is the outer layer of the Earth called?

a)

inner core

b)

outer core

c)

crust

d)

mantle

65.

Which two gases are most common in the atmosphere today?

a)

carbon dioxide

b)

oxygen

c)

nitrogen

d)

argon

66.

Which type of rock are porous?

a)

igneous

b)

metamorphic

c)

sedimentary

67.

When sediments stop moving and settle in one place what is this called?

a)

deposition

b)

erosion

c)

transport

d)

cementation

68.

What is the term for liquid rock underground?

a)

lava

b)

magma

c)

granite

d)

basalt

69.

Different rock types, and the processes that change one rock type into another, are linked in the __________ ________

(a)

70.

Magma moves upwards and forces it's way to the surface and erupts from a volcano. When the liquid rock cools and solidifies what type of rock is formed?

(a)

71.

Name the two processes which put carbon dioxide back into the atmosphere in the carbon cycle.

a)

Combustion

b)

Dissolving

c)

Photosynthesis

d)

Respiration

72.

Which is NOT a store of carbon?

a)

the atmosphere

b)

oceans

c)

ponds

d)

soil

73.

Some gases in the atmosphere absorb some of the radiation reflected by the Earth so that it does not go back into space. What is this known as?

a)

climate change

b)

global warming

c)

greenhouse effect

d)

greenhouse gas

74.

Carbon dioxide and methane are two examples of

a)

climate change

b)

global warming

c)

greenhouse effect

d)

greenhouse gas

75.

An increase in the global average temperature is known as

a)

climate change

b)

global warming

c)

greenhouse effect

d)

greenhouse gas

76.

What is a block of metal called? (e.g. formed when recycling aluminium.)

(a)

77.

When is the term for water loss from plants in the water cycle?

a)

evaporation

b)

condensation

c)

precipitation

d)

transpiration

78.

What is the technical term for rain?

a)

evaporation

b)

condensation

c)

precipitation

d)

transpiration

79.

How many atoms are there in this molecule?

a)

2

b)

3

c)

4

d)

5

80.

Suggest the pH value of lemon juice?

a)

1

b)

3

c)

7

d)

10

81.

Suggest the pH value of hydrochloric acid?

a)

1

b)

3

c)

7

d)

10

82.

Suggest the pH value of soap?

a)

1

b)

3

c)

7

d)

10

83.

When magnesium is added to hydrochloric acid, what gas is produced?

a)

carbon dioxide

b)

oxygen

c)

chlorine

d)

hydrogen

84.

Which of the following gases has the highest atmospheric composition within the Earth's Atmosphere?

a)

Oxygen at 78%

b)

Nitrogen at 78%

c)

Carbon Dioxide 78%

d)

Methane 78%

85.

What gas is always produced when a metal reacts with water?

a)

Oxygen

b)

Carbon dioxide

c)

Hydrogen

d)

Carbon monoxide

86.

How many atoms of oxygen are there in water? H₂O

a)

1

b)

2

c)

0

87.

What are the different elements in carbon dioxide?

a)

carbon

b)

cobalt and oxygen

c)

oxygen and carbon

d)

oxide and carbon

88.

What is the pH of pure water?

a)

0

b)

3

c)

7

d)

11

e)

14

89.

Select the products that are made by a neutralisation reaction

a)

acid

b)

base

c)

salt

d)

water

e)

hydrogen

90.

Which indicator gives the biggest range of colours

a)

red cabbage

b)

litmus

c)

universal indicator

d)

phenolphthalein

91.

Litmus Red turn blue in…

a)

water

b)

acids

c)

alkalis

d)

neutral

92.

Name the hazard…

a)

irritant

b)

corrosive

c)

flammable

d)

toxic to the environment

e)

poisonous

93.

Name the hazard…

a)

irritant

b)

corrosive

c)

flammable

d)

toxic to the enviroment

e)

poisonous

94.

Name the hazard…

a)

irritant

b)

corrosive

c)

flammable

d)

toxic to the environment

e)

poisonous

95.

Universal indicator is added to a solution. The solution turns purple. The solution contains

a)

citric acid

b)

hydrochloric acid

c)

sodium hydroxide solution

d)

only water

96.

What is this piece of apparatus called

a)

Pipette

b)

Burette

c)

Janette

d)

Cuvette

97.

What is the reading on this burette?

a)

24.0cm³

b)

25.8cm³

c)

24.2cm³

d)

23.9cm³

98.

HCl + NaOH →

a)

NaH + ClOH

b)

NaCl + H₂

c)

NaCl + H₂O

d)

NaCl + Cl₂

99.

I am titrating 1M HCl with 1M NaOH. I have 25mL of HCl. How much NaOH will I need?

a)

2.5mL

b)

5mL

c)

25mL

d)

50mL

100.

An endothermic reaction...

a)

Releases energy to the surrounding area.

b)

Boils the chemicals.

c)

Evaporates the chemicals.

d)

Takes in energy from the surrounding area.

101.

An exothermic reaction...

a)

Releases energy to the surrounding area.

b)

Boils the reacting chemicals.

c)

Evaporates the reacting chemicals.

d)

Takes in energy from the surrounding area.

102.

___________ reactions feel cold.

a)

Exothermic

b)

Endothermic

c)

Chemical

103.

___________ reactions feel warm.

a)

Chemical

b)

Endothermic

c)

Exothermic

104.

What equipment would you use to determine whether a reaction is endothermic or exothermic?

a)

Balance (scales)

b)

Ruler

c)

Universal Indicator

d)

Thermometer

105.

A fizzy sweet, when eaten feels cold. Why?

a)

They are made of ice.

b)

It is dissolving.

c)

There is an endothermic reaction.

d)

There is an exothermic reaction.

106.

The reactivity series describes how (a) common metals are, relative to each other.

107.

Two reactive metals are placed inside a lemon. These are connected to a lightbulb. The lightbulb lights up, why?

a)

The reaction between metals in the acidic lemon transfers charge between them.

b)

The metals reacting causes electrons to appear.

c)

The metals complete the circuit.

d)

Acidic lemons are batteries.

108.

Using the image. Determine why Gold, Silver and Platinum are metals used for Jewellery.

a)

They react with skin.

b)

They are valuable.

c)

They are unlikely to react with skin.

d)

They are rare and therefore profitable.

109.

$Zinc\ +\ Iron\ Sulphate\ \rightarrow\ Zinc\ Sulphate\ +\ Iron$

$Zn\ +\ FeSO_4\ \rightarrow\ ZnSO_4\ +\ Fe$

Which kind of reaction is this?

a)

Displacement Reaction

b)

Condensation Reaction

c)

Potato Reaction

d)

Reactivity Reaction

110.

$Zn\ +\ FeSO_4\ \rightarrow\ ZnSO_4\ +\ Fe$

In this reaction Zinc displaces Iron. Is Iron higher (more) or lower (less) on the reactivity series than Zinc?

a)

Higher (more reactive)

b)

Lower (less reactive)

c)

The same

d)

Not enough information to confirm.

111.

$Al\ +HCl\ \ \rightarrow\ AlCl_3+H_2$

Balance this equation.

a)

It is already balanced.

b)

$2Al\ +6HCl\ \rightarrow\ 2AlCl_3\ +\ 3H_2$

c)

$Al\ +\ 6HCl\ \rightarrow\ AlCl_3\ +3H_3$

112.

What is meant by the 'conservation of mass'?

a)

The overall mass of reactants changes during a reaction.

b)

The overall mass of reactants stays the same before and after a reaction.

c)

Chemicals have mass.

d)

Potatoes

113.

Magnesium is burned in a crucible to form magnesium oxide.

The mass before being burned is 1.5g.

The mass afterwards is 1.8g.

The mass in the crucible has increased. Pick 2 answers that best explain the reaction.

a)

Oxygen from the air has bonded with the magnesium...

b)

...mass is conserved and the air now has less oxygen.

c)

Magnesium has been released into the air...

d)

... The air has more oxygen than before, mass has increased and therefore is not conserved.

114.

What is a neutralisation reaction and what do they produce?

a)

An acid and an alkali react to neutralise each other...

b)

...this produces a metal.

c)

Neutrons are exchanged between metals...

d)

...this produces a salt and water.

115.

What is a physical change?

a)

When a substance changes state.

b)

When a substance changes size.

c)

When a substance changes shape.

d)

When a substance chemically reacts.

116.

Which of these is not the name of a process for physical change.

a)

Freezing/Fusion

b)

Vaporisation

c)

Melting

d)

Neutralisation

117.

What is the name given for a burning a fuel?

a)

Combustion (Oxidation)

b)

Neutralisation

c)

Displacement Reaction

d)

Precipitation

118.

What is a composite material?

a)

MDF

b)

A material made from 2 or more other materials.

c)

A material made up of 1 element.

d)

Kevlar

119.

What are the names given for the different materials in a composite?

a)

Solid & Liquid

b)

Reinforcement & Structure

c)

Structure & Liquid

d)

Reinforcement & Matrix

120.

This image shows reinforced concrete being made with steel and cement. Which answer describes reinforced concrete?

a)

Composite

Matrix: Cement

Reinforcement: Steel

b)

Polymer

Matrix: Cement

Reinforcement: Steel

c)

Ceramic

Matrix: Steel

Reinforcement: Cement

d)

Composite

Matrix: Steel

Reinforcement: Cement

121.

What best describes polymers?

a)

2 different materials combined.

b)

More than 2 materials combined.

c)

Long chains of smaller joined molecules.

d)

Synthetic

122.

What is meant by the term 'plastic'?

a)

PET

b)

A material that won't change shape after it is moulded.

c)

A material that returns to its original shape when stretched.

d)

An environmentally friendly resource.

123.

What is meant by the term 'elastic'?

a)

A material that returns to its original shape when stretched.

b)

A material that maintains its shape once it is moulded.

c)

PET

d)

Rubber

124.

Synthetic polymers are...

a)

made by humans.

b)

made from trees.

c)

made by bees.

d)

Made through photosynthesis.

125.

Natural polymers...

a)

are found to be naturally occurring.

b)

are created by humans.

c)

are created by bees.

d)

are delicious.

126.

Rubber, DNA, Hair, Finger Nails, Wool, Starch and Cellulose are examples of...

a)

Natural Composites.

b)

Natural Polymers.

c)

Natural Ceramics.

d)

Synthetic Polymers.

127.

Vulcanised rubber is...

a)

Rubber extracted from the Vulcana Tree.

b)

Rubber extracted from the igneous rock of a volcano.

c)

Rubber heated with Sulfur to make it elastic.

d)

Rubber heated to make it brittle.

128.

Why would you use polymers for an electrical plug coating? Choose all that apply.

a)

It can be moulded into a shape.

b)

It can be made to be flexible.

c)

It is an electrical conductor.

d)

It is an electrical insulator.

129.

Why would you choose to make a teapot out of a ceramic material? Choose all that apply.

a)

It is an insulator of heat.

b)

It is hard wearing.

c)

It is a conductor of heat.

d)

It is soft and flexible.

130.

Which of the following is not an environmental/pollution issue from fuel combustion?

a)

Acid Rain

b)

Not energy efficient.

c)

Greenhouse Gases.

d)

Smog.

131.

What Pokemon is this?

a)

Pikachu

b)

Kangaskhan

c)

Voltorb

d)

Mewtwo

132.

Which of these elements makes up the name of a metal band?

a)

IRON

Maiden

b)

GOLD

Pistachio

c)

Neil

DIAMOND

d)

HYDROGEN

Panther

133.

Which of these is not a safety requirement in a chemistry experiment?

a)

Eye-Protection (Goggles).

b)

Hair tied back.

c)

Clear walkways.

d)

Removing Glasses.

134.

Which of these is the odd one out?

a)

British Short-Hair

b)

Labrador

c)

Irish Water Spaniel

d)

Italian Spinone

135.

When does incomplete combustion occur?

a)

Too much oxygen supplied.

b)

Not enough oxygen supplied.

c)

Too much Carbon.

d)

Poor quality fuel combusted.

136.

$hydrocarbon\ +\ oxygen\ \rightarrow\ carbon\ dioxide\ +\ water$

Is the chemical word formula for...

a)

Incomplete Combustion.

b)

Displacement Reaction.

c)

Complete Combustion.

d)

Acid Rain.

137.

When a metal tarnishes it reacts with which gas in the air?

a)

Sulfur

b)

Nitrogen

c)

Hydrogen

d)

Oxygen

138.

What sort of compound is formed when a metal becomes tarnished in air?

a)

Metal Sulphate

b)

Metal Oxide

c)

Metal Hydrate

d)

Metal Nitrate

KS3 Chemistry Quiz

Total questions: 138

Worksheet time: 2hrs 36mins

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