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Worksheets

Chemistry IGCSE

Total questions: 212

Worksheet time: 4hrs 27mins

Name
Class
Date
1.
2H2  +   O2  →  2H2O
How many moles of oxygen are consumed if 8 moles H2 are used?
a)
2
b)
4
c)
6
d)
8
2.
For the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?
a)
3mol Mg / 2 mol Fe
b)
2 mol Mg/ 3 mol Fe
c)
1 mol Fe/ 2 mol Fe
d)
3 mol MgO / 2 mol Fe
3.
2 KClO3 → 2 KCl + 3 O2
How many moles of oxygen are produced when 6.7 moles of KClO3 decompose completely?
a)
6.7 mol
b)
1.0 mol
c)
10.1 mol
d)
4.5 mol
4.
2Na + 2H2O → 2NaOH+ H2
How many grams of hydrogen are produced if 120 g of Na are available?
a)
5.2 g
b)
2.6 g
c)
690 g
d)
45 g
5.
 SiO2 + 3C → SiC + 2CO
I need to add 8 moles of Carbon to the reaction. How many grams of Carbon should I weigh?
a)
96 g
b)
0.67 g
c)
2.67 g
d)
48 g
6.
Cl2 + 2 KBr → Br2 + 2 KCl
How many grams of potassium chloride can be produced from 356 g of chlorine and 356 g of potassium bromide?
a)
749 g
b)
223 g
c)
479 g
d)
814 g
7.
CH4 + 2 O2 → CO2 + 2 H2O
How many moles of carbon dioxide are produced from the combustion of 110 g of CH4?
a)
13.7 mol
b)
2.75 mol
c)
6.11 mol
d)
6.85 mol
8.
2 NaClO3 (s) --> 2NaCl (s) +3 O2 (g)  
12.00 moles of NaClO3 will produce how many grams of O2?
a)
256 g of O2
b)
576 g of O2
c)
288 g O2
9.
B2H6 + 3O2 -->2 HBO2 + 2 H2O
 What mass of O2 will be needed to burn 36.1 g of B2H6?
a)
13.8 g O2
b)
3.86 mol of O2
c)
124 g O2
10.
4 Al + 3 O2 –> 2 Al2O3  How much aluminum would be needed to completely react with 45 grams of O2?
a)
1.05 moles
b)
3.75 moles
c)
1.875 grams
d)
1.875 moles
11.
KNO3 --> KNO2 + O2
What coefficients are needed to balance the reaction?
a)
2, 2, 1
b)
2, 3, 2
c)
1, 2, 2
d)
1, 3, 1
12.
O2 + CS2 --> CO2 + SO2
What coefficient would go in front of the O2?
a)
1
b)
2
c)
3
d)
4
13.
WO3 + H2 --> W + H2O
What coefficient goes in front of H2?
a)
1
b)
2
c)
3
d)
4
14.
When does a chemical reaction stop?
a)
When the lab is finished
b)
When the excess reactant is used up
c)
When the limiting reactant is used up
d)
Chemical reactions never stop
15.
Use the equation 2 Al + 3 Cl2 ---> 2 AlCl3.  If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.
a)
AlCl3
b)
Cl2
c)
Al
d)
Gary Busey
16.

What is the name of the element with an atomic number of 3?

a)

Lithium

b)

Magnesium

c)

Sodium

d)

Potassium

17.

The atomic mass of an element tells you

a)

The number of protons and neutrons

b)

The number of protons and electrons

c)

The number of neutrons and electrons

d)

The number of neutrons only

18.

The atomic number tells you

a)

The number of electrons

b)

The number of protons

c)

The number of neutrons

d)

The number of nucleons

19.

The electronic configuration of a magnesium ATOM is

a)

2, 8

b)

2, 8, 3

c)

2, 6

d)

2, 8, 2

20.

The electron configuration of a magnesium ION is

a)

2, 8, 6

b)

2, 8, 8

c)

2, 8, 2

d)

2, 8

21.

Elements from groups 1-3

a)

Are metals and lose electrons in a chemical reaction to become CATIONS

b)

Are metals and lose electrons in a chemical reaction to become ANIONS

c)

Are metals and gain electrons in a chemical reaction to become CATIONS

d)

Are metals and gain electrons in a chemical reaction to become ANIONS

22.

Which element has an electronic configuration of 2, 7

a)

Chlorine

b)

Bromine

c)

Fluorine

d)

Iodine

23.

Phosphorus does the following in a chemical reaction

a)

LOSES 3 electrons to become an ANION

b)

LOSES 3 electrons to become a CATION

c)

GAINS 3 electrons to become a CATION

d)

GAINS 3 electrons to become an ANION

24.

When lithium and potassium react, they would undergo which type of bonding

a)

Ionic

b)

Metallic

c)

Covalent

d)

Diamagnetic

25.

When hydrogen and sulfur react together, they undergo which type of bonding?

a)

Metallic

b)

Ionic

c)

Teronic

d)

Covalent

26.

When sodium and bromine undergo a chemical reaction, ionic bonding takes place. Which description best matches what occurs?

a)

Sodium is from group 1. It gives its 1 valence electron to chlorine. Chlorine is from group 7. It received the 1 valence electron from sodium.

b)

Sodium is from group 7. It gives its 1 valence electron to chlorine. Chlorine is from group 1. It received the 1 valence electron from sodium.

c)

Sodium is from group 1. It receives 1 valence electron from chlorine. Chlorine is from group 7. It gives 1 valence electron to sodium.

d)

Sodium is from group 7. It receives 1 valence electron from chlorine. Chlorine is from group 1. It gives 1 valence electron to sodium.

27.

Metallic bonding takes place between

a)

A metal and non-metal

b)

Elements from groups 1-3 and transition metals

c)

Two non-metals

d)

A non-metal and a noble gas

28.

Which statement best describes the following species: Al3+

a)

This is an aluminium cation. It has lost 3 electrons

b)

This is an aluminium cation. It has gained 3 electrons

c)

This is an aluminium anion. It has lost 3 electrons

d)

This is an aluminium anion. It has gained 3 electrons

29.

Which statement best describes the following species: O2-

a)

This is an oxygen anion. It is called oxygen

b)

This is an oxygen anion. It is called oxide

c)

This is an oxygen cation. It is called oxygen

d)

This is an oxygen cation. It is called oxide

30.

How would you name the following compound? MgS2

a)

Magnesium sulfur

b)

Dimagnesium sulfide

c)

Magnesium sulfide

d)

Magneside sulfide

31.

Write the formula for calcium chloride

a)

CaCl

b)

Ca2Cl

c)

CaCl2

d)

Ca3Cl2

32.

Write the electronic configuration of the Boron atom (as an ion)

a)

2, 3

b)

3, 2, 1

c)

1

d)

2

33.

Which of the following statements regarding halogens is true?

a)

Halogens are from group 6. They lose 2 electrons in a chemical reaction

b)

Halogens are from group 7. They gain 1 electron in a chemical reaction.

c)

Halogens are from group 6. They gain 2 electrons in a chemical reaction.

d)

Halogens are from group 7. They lose 1 electron in a chemical reaction.

34.

According to the chemical symbol... Which statement is correct?

a)

This is potassium. It's from group 1. It has 19 protons, 19 electrons and 20 neutrons.

b)

This is potassium. It's from group 1. It has 19 protons, 20 electrons and 20 neutrons.

c)

This is potassium. It's from group 7. It has 19 protons, 20 electrons and 19 neutrons.

d)

This is potassium. It's from group 7. It has 19 protons, 19 electrons and 20 neutrons.

35.

The following structure can be described as...

a)

An element as it only has 1 type of atom present. It has covalent bonding.

b)

A compound as it has more than 1 type of atom present. It has covalent bonding.

c)

An element as it has more than 1 type of atom present. It has metallic bonding.

d)

An element because it has more than 1 type of atom present. It has covalent bonding.

36.

What is this process called?

a)

Distillation

b)

Fractional Distillation

c)

Reverse Distillation

d)

Destructive Distillation

37.

This process is based of the fact that all compounds being separated have

a)

A boiling point

b)

Same boiling points

c)

Different boiling points

d)

No boiling points

38.
How does the temperature change from top to bottom?
a)
Increases
b)
Decreases
c)
It does not change
d)
Cannot be determined
39.
What does the viscosity of a hydrocarbon tell you?
a)
How easily it flows
b)
How easily it sets alight
c)
What its boiling point is
d)
How long the hydrocarbon is
40.
The longer the hydrocarbon, the ________ the flammability?
a)
Lower
b)
Higher
41.
The longer the hydrocarbon, the _________ the viscosity?
a)
Lower
b)
Higher
42.
How many carbon atoms are in methane?
a)
1
b)
2
c)
3
d)
4
43.
If an alkane has 20 carbon atoms, how many hydrogen atoms will it have?
a)
20
b)
22
c)
40
d)
42
44.
Which formula represents a saturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
45.
Which formula represents an unsaturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
46.

What chemical is this? (C5H10)

a)

Pentene

b)

Pentane

c)

Hexane

d)

Heptene

47.
Hydrocarbons are compounds that contain
a)
Carbon, only
b)
Carbon and Hydrogen, only
c)
Carbon, Oxygen, and Hydrogen, only
d)
Carbon, Oxygen, Hydrogen, and Nitrogen, only
48.
Cracking.....
a)
Breaks larger hydrocarbons into smaller hydrocarbons
b)
Separates hydrocarbons based on their length
c)
Detects alkenes
49.
What liquid detects the presence of an alkene?
a)
Alkene water
b)
Bromine water
c)
Water
d)
Limewater
50.

Complete the equation C16H34 ---> __________ + C2H4

a)

C16H34

b)

C2H30

c)

C10H20

d)

C14H30

51.

When testing for alkenes (unsaturation) bromine water turns from...

a)

orange --> blue/black

b)

colourless --> pink

c)

orange --> colourless

d)

orange --> clear

52.

Alkenes have the general formula:

a)

CnH2n

b)

CnH2n+1

c)

CnH2n+2

d)

CnHn

53.

Alkanes have the general formula:

a)

CnH2n

b)

CnH2n+1

c)

CnH2n+2

d)

CnHn

54.

Compounds that are composed of the same number and type of atoms but have them arranged in different ways are ___________.

a)

isomers

b)

isotopes

c)

polymers

d)

alkanes

55.
Are the following molecules isomers?
a)
Yes
b)
No
56.
Are the following molecules isomers
a)
Yes
b)
No
57.
A structural isomer of pentane is?
a)
2,2-dimethyl octane
b)
2-methyl butane
c)
1-methyl propane
d)
1-methyl pentane
58.
Melting and boiling points of alkanes
a)
increase with the number of carbon atoms in the chain
b)
decrease with the number of carbon atoms in the chain
c)
increase with branching
d)
are determined by the bonding between the carbons and hydrogens
59.
Why carbon can form long chains while other elements can't.
a)
because carbon is the most unstable nonmetal elements
b)
carbon can form 4 covalent bonds and become very stable
c)
carbon is the most abundant element on the surface of our planet
d)
every organic compound contains carbon
60.

Fill in the blank:

What are the Reactants of the combustion reaction?


_______ + _______ --> CO2 + H2O + Energy

a)

Carbon Dioxide (CO2) + Water (H2O)

b)

Fuel (C2H6) + Oxygen (O2)

c)

Carbon Dioxide (CO2) + Oxygen (O2)

d)

Fuel (C2H6) + Water (H2O)

61.

What is the atomic number of an element?

a)

The atomic number of an element is the number of neutrons in its nucleus.

b)

The atomic number of an element is the number of electrons in its nucleus.

c)

The atomic number of an element is the number of protons in its nucleus.

d)

The atomic number of an element is the number of isotopes it has.

62.

Choose a suitable test to test the presence of hydrogen gas.

a)

Lighted splint test

b)

Glowing splint test

c)

Lime water test

d)

Bromine test

63.

Explain the difference between an atom and an ion.

a)

An atom and an ion are the same thing.

b)

An atom is smaller than an ion.

c)

An atom has a charge, while an ion is neutral.

d)

An atom is neutral, while an ion has a positive or negative charge.

64.

How do ionic bonds form?

a)

By sharing protons between atoms.

b)

By forming covalent bonds.

c)

By releasing neutrons during a reaction.

d)

By one atom transferring electrons to another atom.

65.

What is the colour change of anhydrous copper (II) sulphate when added with water?

a)

Blue to pink

b)

Blue to white

c)

White to blue

d)

White to pink

66.

Describe the process of neutralization.

a)

Neutralization is a chemical reaction between an acid and a base, resulting in the formation of water and a salt.

b)

Neutralization results in the formation of oxygen and carbon dioxide.

c)

Neutralization is a biological process involving plants and animals.

d)

Neutralization is a physical reaction between an acid and a base.

67.

What is the difference between exothermic and endothermic reactions?

a)

Exothermic reactions occur in cold environments while endothermic reactions occur in hot environments

b)

Exothermic reactions absorb energy while endothermic reactions release energy

c)

Exothermic reactions release energy, usually in the form of heat, while endothermic reactions absorb energy from their surroundings.

d)

Exothermic reactions are slower than endothermic reactions

68.

What is the role of catalysts in chemical reactions?

a)

Catalysts slow down reactions by increasing activation energy.

b)

Catalysts speed up reactions by lowering activation energy.

c)

Catalysts change the products of reactions.

d)

Catalysts have no effect on the speed of reactions.

69.

Explain the concept of oxidation and reduction in electrolysis.

a)

Oxidation and reduction both happen at the same electrode.

b)

Oxidation occurs at the cathode and reduction at the anode.

c)

Electrons are gained at the anode and lost at the cathode.

d)

Oxidation happens at the anode, where electrons are lost, and reduction occurs at the cathode, where electrons are gained.

70.

What are hydrocarbons?

a)

Synthetic materials used in construction.

b)

Minerals found in the ocean.

c)

Organic compounds consisting of hydrogen and carbon atoms.

d)

Inorganic compounds consisting of hydrogen and carbon atoms.

71.

Choose the colour and state of chlorine at room temperature

a)

Orange-brown gas

b)

Orange-brown liquid

c)

Green-yellow liquid

d)

Green-yellow gas

72.

What is the difference between saturated and unsaturated hydrocarbons?

a)

Saturated hydrocarbons are solid at room temperature, while unsaturated hydrocarbons are liquid.

b)

Saturated hydrocarbons have only double bonds, while unsaturated hydrocarbons have only single bonds.

c)

Saturated hydrocarbons are more reactive than unsaturated hydrocarbons.

d)

Saturated hydrocarbons have all single bonds, while unsaturated hydrocarbons have at least one double or triple bond.

73.

Arrange these elements from the lowest reactivity to the highest reactivity.

Cu, Ag, K, Mg, Zn

a)

Ag, K, Mg, Zn, Cu

b)

K, Mg, Cu, Ag, Zn

c)

Ag, Cu, Zn, Mg, K

d)

Cu, Zn, Ag, Mg, K

74.

How does temperature affect the rate of a reaction?

a)

Temperature has no effect on the rate of a reaction.

b)

Temperature increases the rate of a reaction by providing more kinetic energy to the reactant molecules.

c)

Temperature causes the reaction to stop completely.

d)

Temperature decreases the rate of a reaction by slowing down the reactant molecules.

75.

Explain the concept of activation energy.

a)

Activation energy is the energy required to stop a reaction.

b)

Activation energy is the energy released during a reaction.

c)

Activation energy is the minimum energy required for a reaction to occur.

d)

Activation energy is the energy stored in reactants before a reaction.

76.

What are the factors that can affect the rate of a reaction?

a)

Temperature, concentration of reactants, catalysts, surface area, pressure

b)

Volume of the container

c)

Time of day

d)

Color of the reactants

77.

The formula of magnesium ion is Mg2+ while nitrate is NO3-. What is the formula for magnesium nitrate?

a)

MgNO32

b)

Mg(NO3)2

c)

MgNO3

d)

Mg3NO2

78.

Which one is the general formula for alkanes?

a)

CnH2n+2

b)

CnH2n

c)

CnH2n+1

d)

CnH2n+3

79.

What is the colour change if bromine water is added to a sample of propene?

a)

No colour change

b)

Clear to brown

c)

Brown to clear

d)

Brown to white

80.

Choose a greenhouse gas.

a)

CO

b)

CO2

c)

CH4

d)

NO2

81.

Choose the colour of bromine gas.

a)

Yellow

b)

Green

c)

Brown

d)

Purple

82.

What is the product of the following reaction:

Cl2 + MgBr2 --->

a)

Br2 + MgCl

b)

no change

c)

Br2 + MgCl2

d)

Cl2 + MgCl2

83.

Choose the general formula of alkene

a)

CnH2n+1

b)

CnH2n+2

c)

C2H2n

d)

CnH2n

84.

Which one is NOT a condition needed for cracking to happen?

a)

High temperature

b)

High pressure

c)

Catalyst

d)

High volume

85.

What are the ions present in aqueous sodium bromide?

a)

Na+, Br-, H+ and OH-

b)

Na+, Br-, H+ and O2-

c)

Na+, Br2-, H+ and O2-

d)

Na+, Br2-, H+ and OH-

86.

What is this process called?

a)

Distillation

b)

Fractional Distillation

c)

Reverse Distillation

d)

Destructive Distillation

87.

This process is based of the fact that all compounds being separated have

a)

A boiling point

b)

Same boiling points

c)

Different boiling points

d)

No boiling points

88.
How does the temperature change from top to bottom?
a)
Increases
b)
Decreases
c)
It does not change
d)
Cannot be determined
89.
What does the viscosity of a hydrocarbon tell you?
a)
How easily it flows
b)
How easily it sets alight
c)
What its boiling point is
d)
How long the hydrocarbon is
90.
The longer the hydrocarbon, the ________ the flammability?
a)
Lower
b)
Higher
91.
The longer the hydrocarbon, the _________ the viscosity?
a)
Lower
b)
Higher
92.
How many carbon atoms are in methane?
a)
1
b)
2
c)
3
d)
4
93.
If an alkane has 20 carbon atoms, how many hydrogen atoms will it have?
a)
20
b)
22
c)
40
d)
42
94.
Which formula represents a saturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
95.
Which formula represents a saturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
96.
Which formula represents an unsaturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
97.

What chemical is this? (C5H10)

a)

Pentene

b)

Pentane

c)

Hexane

d)

Heptene

98.
Hydrocarbons are compounds that contain
a)
Carbon, only
b)
Carbon and Hydrogen, only
c)
Carbon, Oxygen, and Hydrogen, only
d)
Carbon, Oxygen, Hydrogen, and Nitrogen, only
99.
Cracking.....
a)
Breaks larger hydrocarbons into smaller hydrocarbons
b)
Separates hydrocarbons based on their length
c)
Detects alkenes
100.
What liquid detects the presence of an alkene?
a)
Alkene water
b)
Bromine water
c)
Water
d)
Limewater
101.

Complete the equation C16H34 ---> __________ + C2H4

a)

C16H34

b)

C2H30

c)

C10H20

d)

C14H30

102.

When testing for alkenes (unsaturation) bromine water turns from...

a)

orange --> blue/black

b)

colourless --> pink

c)

orange --> colourless

d)

orange --> clear

103.

Alkenes have the general formula:

a)

CnH2n

b)

CnH2n+1

c)

CnH2n+2

d)

CnHn

104.

Alkanes have the general formula:

a)

CnH2n

b)

CnH2n+1

c)

CnH2n+2

d)

CnHn

105.

Compounds that are composed of the same number and type of atoms but have them arranged in different ways are ___________.

a)

isomers

b)

isotopes

c)

polymers

d)

alkanes

106.
Are the following molecules isomers?
a)
Yes
b)
No
107.
Are the following molecules isomers
a)
Yes
b)
No
108.
A structural isomer of pentane is?
a)
2,2-dimethyl octane
b)
2-methyl butane
c)
1-methyl propane
d)
1-methyl pentane
109.
Melting and boiling points of alkanes
a)
increase with the number of carbon atoms in the chain
b)
decrease with the number of carbon atoms in the chain
c)
increase with branching
d)
are determined by the bonding between the carbons and hydrogens
110.
Why carbon can form long chains while other elements can't.
a)
because carbon is the most unstable nonmetal elements
b)
carbon can form 4 covalent bonds and become very stable
c)
carbon is the most abundant element on the surface of our planet
d)
every organic compound contains carbon
111.

Fill in the blank:

What are the Reactants of the combustion reaction?


_______ + _______ --> CO2 + H2O + Energy

a)

Carbon Dioxide (CO2) + Water (H2O)

b)

Fuel (C2H6) + Oxygen (O2)

c)

Carbon Dioxide (CO2) + Oxygen (O2)

d)

Fuel (C2H6) + Water (H2O)

112.

In which pair are both molecules unsaturated?

a)

A

b)

B

c)

C

d)

D

113.

A filtration is used to remove sand from a mixture of water, salt and sand. What will be in the filtrate?

a)

a mixture of an element and a compound

b)

a mixture of two compounds

c)

one compound only

d)

one element only

114.

Which types of substance do the chemical symbols C, CO2 and O2 represent?

a)

C: compound, CO2: compound, O2: element

b)

C: compound, CO2: element, O2: compound

c)

C: element, CO2: compound, O2: element

d)

C: element, CO2: element, O2: compound

115.

Which element forms an ionic compound with a sodium?

a)

Magnesium

b)

Chlorine

c)

Helium

d)

Potassium

116.

Electrolysis is used separate lead(II) bromide. Lead is formed at cathode. Which statement about the electrolysis is correct?

a)

A green gas is given off at anode

b)

Anode is connected to negative end of the battery

c)

Only a physical change takes place when a current is passed

d)

The electrolyte is in the molten state

117.

What happens during all endothermic changes?

a)

A gas is produced

b)

Solids melt

c)

The temperature decreases

d)

There is a colour change

118.

Which statement describes a redox reaction?

a)

An acid reacts with a base

b)

Only oxidation takes place

c)

Oxygen is transferred from one substance to another

d)

Two substances are both reduced

119.

Dilute hydrochloric acid is added to solid X.

Hydrogen gas is produced.


What is X?

a)

zinc

b)

zinc carbonate

c)

zinc hydroxide

d)

zinc oxide

120.

Which test is used to identify ammonia?

a)

A glowing splint relights

b)

Damp blue litmus paper is bleached

c)

Damp red litmus paper turns blue

d)

Limewater turns milky

121.

A soft metal reacts vigorously with cold water. What is the position of this metal in the Periodic Table?

a)

A

b)

B

c)

C

d)

D

122.

Which statement describes a transition element?

a)

a metal that forms white compounds

b)

a metal with a high melting point

c)

a metal with a low density

d)

a non-metal that forms coloured compounds

123.

P, Q, R and S are four metals.

P forms bubbles of gas with dilute acid but does not react with cold water.

Q reacts slowly with cold water.

R does not react with dilute acid.

S reacts rapidly with cold water.


What is the order of reactivity from most to least reactive?

a)

R → P → Q → S

b)

R → Q → P → S

c)

S → P → Q → R

d)

S → Q → P → R

124.

A colourless liquid is tested with blue cobalt chloride paper.

The paper turns pink.


Which statement about the liquid must be correct?

a)

it contains water

b)

it is acidic

c)

is is anhydrous

d)

it is pure water

125.

Which reaction involves combustion?

a)

calcium carbonate → calcium oxide + carbon dioxide

b)

methane + oxygen → carbon dioxide + water

c)

sodium carbonate + hydrochloric acid → sodium chloride + water + carbon dioxide

d)

sodium hydroxide + hydrochloric acid → sodium chloride + water

126.

What is the name of the type of compound containing only carbon and hydrogen?

a)

carbohydrate

b)

carbonate

c)

hydrocarbon

d)

hydroxide

127.

Question in the picture

a)

A

b)

B

c)

C

d)

D

128.

A beaker contains vinegar is put in a bowl with water. Solid sodium carbonate is added to vinegar in the beaker and stirred. The water in the bowl freezes.


Which statement about the reaction explains why the water freezes?

a)

it is a redox reaction

b)

it is an endothermic reaction

c)

it is catalysed by sodium carbonate

d)

it is thermal decomposition

129.

Carbon dioxide reacts with carbon.


carbon dioxide + carbon → carbon monoxide


Which describes what happens to the carbon dioxide and to the carbon during the reaction?

a)

carbon dioxide: oxidised, carbon: oxidised

b)

carbon dioxide: oxidised, carbon: reduced

c)

carbon dioxide: reduced, carbon: oxidised

d)

carbon dioxide: reduced, carbon: reduced

130.

Which element reacts with dilute sulfuric acid to form a salt?

a)

carbon

b)

copper

c)

sulfur

d)

zinc

131.

The results of two tests on substance Q are shown.


test 1: add dilute hydrochloric acid to solid Q

result: bubbles of colourless gas, R, which turns limewater milky


test 2: add aqueous sodium hydroxide to a solution of Q

result: green precipitate


Which cation is present in Q and what is gas R?

a)

Q: iron (II), R: carbon dioxide

b)

Q: iron (II), R: chlorine

c)

Q: iron (III), R: carbon dioxide

d)

Q: iron (III), R: chlorine

132.

Which metal reacts with dilute hydrochloric acid but does not react with cold water?

a)

potassium

b)

calcium

c)

sodium

d)

zinc

133.

What is a chemical test for water?

a)

it boils at 100oC

b)

it turns blue cobalt chloride paper pink

c)

it turns blue copper sulfate crystals white

d)

it turns pink litmus paper blue

134.

Petroleum is a mixture of hydrocarbon molecules.


Which describes the method of separation of petroleum and the type of bond in hydrocarbon molecules?

a)

distillation; covalent bond

b)

distillation; ionic bond

c)

fractional distillation; covalent bond

d)

fractional distillation; ionic bond

135.

Which describes an element and a compound?

a)

element: contains more than one type of atom

compound: contains elements chemically combined

b)

element: contains more than one type of atom

compound: contains elements mixed together

c)

element: contains only one type of atom

compound: contains elements chemically combined

d)

element: contains only one type of atom

compound: contains elements mixed together

136.

Which temperature changes occur during exothermic and endothermic reactions?

a)

exo: decrease, endo: increases

b)

exo: decrease, endo: no change

c)

exo: increases, endo: decreases

d)

exo: increases, endo: no change

137.

What is a catalyst?

a)

a substance that decreases the rate of reaction and is chemically changed at the end of the reaction

b)

a substance that decreases the rate of reaction and is chemically unchanged at the end of the reaction

c)

a substance that increases the rate of reaction and is chemically changed at the end of the reaction

d)

a substance that increases the rate of reaction and is chemically unchanged at the end of the reaction

138.

Which word equation represents the reaction of an acid with a carbonate?

a)

acid + carbonate → salt + carbon dioxide

b)

acid + carbonate → salt + carbon dioxide + water

c)

acid + carbonate → salt + hydrogen + water

d)

acid + carbonate → salt + water

139.

The results of two tests on substance R are shown.


test 1: add aqueous sodium hydroxide

result: red-brown precipitate formed, insoluble in excess


test 2: dilute nitric acid added followed by silver nitrate solution

result: white precipitate formed


What is R?

a)

iron(II) carbonate

b)

iron(III) carbonate

c)

iron(II) chloride

d)

iron(III) chloride

140.

W, X, Y and Z are four metals.


W forms a compound that is used to speed up chemical reactions.

X forms coloured compounds.

Y has a high melting point.

Z has a low density.


Which metals are transition elements?

a)

W, X and Y

b)

W and X only

c)

X, Y and Z

d)

Y and Z only

141.

Which element does not produce a gas when added to dilute hydrochloric acid?

a)

copper

b)

iron

c)

magnesium

d)

zinc

142.

Which processes are used in the purification of the water supply?

a)

fractional distillation and chlorination

b)

fractional distillation and crystallisation

c)

filtration and chlorination

d)

filtration and crystallisation

143.

Which fuel is not obtained from petroleum?

a)

coal

b)

gasoline

c)

diesel

d)

refinery gas

144.

Question on the picture

a)

A

b)

B

c)

C

d)

D

145.

Question on the picture

a)

P is a single substance

b)

Q contains two substances

c)

R contains two substances

d)

S is a single substance

146.

Which particle has the smallest mass?

a)

atom

b)

electron

c)

neutron

d)

proton

147.

Which statement about compounds is correct?

a)

An ionic compound contains two metallic elements bonded together.

b)

In an ionic compound, metal ions are negatively charged.

c)

When metals combine with non-metals, electrons are shared between the atoms.

d)

When two non-metals combine, molecules are formed.

148.

Solid calcium oxide reacts with cold water forming calcium hydroxide.

As the cold water is added, steam is seen coming from the solid.

Which statement describes the reaction?

a)

It is endothermic and the temperature decreases.

b)

It is endothermic and the temperature increases.

c)

It is exothermic and the temperature decreases.

d)

It is exothermic and the temperature increases.

149.

Hydrochloric acid reacts with aqueous sodium hydroxide to form a neutral solution of sodium chloride.


Which process must be used to obtain dry crystals of sodium chloride from this solution?

a)

distillation

b)

evaporation

c)

filtration

d)

neutralisation

150.

Which statement describes a trend in the elements going down Group VII?

a)

They are darker in colour.

b)

They are displaced from their salts by elements lower down the group.

c)

They are more reactive.

d)

They have lower boiling points.

151.

Many coins are made of an alloy.

Which property of an alloy makes it suitable for coins?

a)

conducts electricity

b)

expensive to buy

c)

resistant to corrosion

d)

soft and malleable

152.

What is formed during the complete combustion of a hydrocarbon?

a)

carbon dioxide and water

b)

carbon dioxide only

c)

carbon monoxide and carbon dioxide

d)

carbon monoxide only

153.
a)

A

b)

B

c)

C

d)

D

154.
a)

A

b)

B

c)

C

d)

D

155.
a)

A

b)

B

c)

C

d)

D

156.
a)

A

b)

B

c)

C

d)

D

157.
a)

A

b)

B

c)

C

d)

D

158.
a)

A

b)

B

c)

C

d)

D

159.
a)

A

b)

B

c)

C

d)

D

160.
a)

A

b)

B

c)

C

d)

D

161.
a)

A

b)

B

c)

C

d)

D

162.
a)

A

b)

B

c)

C

d)

D

163.
a)

A

b)

B

c)

C

d)

D

164.
a)

A

b)

B

c)

C

d)

D

165.
a)

A

b)

B

c)

C

d)

D

166.
a)

A

b)

B

c)

C

d)

D

167.
a)

A

b)

B

c)

C

d)

D

168.
a)

A

b)

B

c)

C

d)

D

169.
a)

A

b)

B

c)

C

d)

D

170.
a)

A

b)

B

c)

C

d)

D

171.
a)

A

b)

B

c)

C

d)

D

172.
a)

A

b)

B

c)

C

d)

D

173.
a)

A

b)

B

c)

C

d)

D

174.
a)

A

b)

B

c)

C

d)

D

175.
a)

A

b)

B

c)

C

d)

D

176.
a)

A

b)

B

c)

C

d)

D

177.
a)

A

b)

B

c)

C

d)

D

178.
a)

A

b)

B

c)

C

d)

D

179.
a)

A

b)

B

c)

C

d)

D

180.
a)

A

b)

B

c)

C

d)

D

181.
a)

A

b)

B

c)

C

d)

D

182.
a)

A

b)

B

c)

C

d)

D

183.
a)

A

b)

B

c)

C

d)

D

184.
a)

A

b)

B

c)

C

d)

D

185.
a)

A

b)

B

c)

C

d)

D

186.
a)

A

b)

B

c)

C

d)

D

187.
a)

A

b)

B

c)

C

d)

D

188.
a)

A

b)

B

c)

C

d)

D

189.
a)

A

b)

B

c)

C

d)

D

190.
a)

A

b)

B

c)

C

d)

D

191.

A

a)

A

b)

B

c)

C

d)

D

192.
a)

A

b)

B

c)

C

d)

D

193.
a)

A

b)

B

c)

C

d)

D

194.
a)

A

b)

B

c)

C

d)

D

195.
a)

A

b)

B

c)

C

d)

D

196.
a)

A

b)

B

c)

C

d)

D

197.
a)

A

b)

B

c)

C

d)

D

198.
a)

A

b)

B

c)

C

d)

D

199.
a)

A

b)

B

c)

C

d)

D

200.
a)

A

b)

B

c)

C

d)

D

201.
a)

A

b)

B

c)

C

d)

D

202.
a)

A

b)

B

c)

C

d)

D

203.
a)

A

b)

B

c)

C

d)

D

204.
a)

A

b)

B

c)

C

d)

D

205.
a)

A

b)

B

c)

C

d)

D

206.
a)

A

b)

B

c)

C

d)

D

207.
a)

A

b)

B

c)

C

d)

D

208.
a)

A

b)

B

c)

C

d)

D

209.
a)

A

b)

B

c)

C

d)

D

210.
a)

A

b)

B

c)

C

d)

D

211.
a)

A

b)

B

c)

C

d)

D

212.
a)

A

b)

B

c)

C

d)

D