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Y12 Chemistry Revision Quiz

Total questions: 100

Worksheet time: 2hrs 42mins

Name
Class
Date
1.

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

a)

Oxygen

b)

Carbon Dioxide

c)

Hydrogen

d)

Carbon Monoxide

2.

What is name of the gas which is produced when metals react with acids?

a)

Hydrogen

b)

Carbon Dioxide

c)

Nitrogen

d)

Oxygen

3.

When a metal compound reacts with a more reactive metal, what sort of reaction occurs?

a)

Displacement

b)

Neutralisation

c)

Combustion

d)

No Reaction

4.

When copper and magnesium sulphate are mixed together, there is no reaction. Why?

a)

Magnesium is more reactive than copper

b)

Copper is more reactive than magnesium

c)

Copper never reacts with metal salts

d)

Magnesium Sulfate never reacts with metals

5.

Magnesium chloride + Sodium → ?

a)

Sodium chloride + Magnesium

b)

Magnesium chloride + Sodium (No change)

c)

Sodium magnesium + Chlorine

d)

Magnesium sodium chloride

6.

Zinc sulphate + Magnesium → ?

a)

Magnesium + Sulfur + Hydrogen

b)

Zinc sulfate + Magnesium

c)

Magnesium sulfate + Zinc

d)

Zinc + Sulfur + Hydrogen

7.

What is the correct equation when potassium reacts with water?

a)

2K (s) + H2O (l) --> KOH (aq) + H2 (g)

b)

K (s) + 2H2O (l) --> KOH (aq) + 2H2 (g)

c)

2K (s) + 2H2O (l) --> 2KOH (aq) + H2 (g)

d)

K (s) + H2O (l) --> KOH (aq) + H2 (g)

8.

Which of the following does not react with water?

a)

Lithium

b)

Magnesium

c)

Lead

d)

Calcium

9.

Which one of the following metals reacts most vigorously with cold water?

a)

Sodium

b)

Magnesium

c)

Copper

d)

Zinc

10.

Which four numbers a, b, c and d are written to balance the equation?

a Fe (s) + b H2SO4 (aq) → c FeSO4(aq) + d H2 (g)

a)

1,1,1,1

b)

2, 3, 2, 2

c)

3, 4, 1, 2

d)

2, 3, 1, 4

11.

Given the equation ...

2Na(?) + 2H2O(?) → 2NaOH(X) + H2(?)

Which state symbol should be where (X) is?

a)

(s)

b)

(g)

c)

(l)

d)

(aq)

12.

Which one of the followings would result in a displacement reaction?

a)

Iron with magnesium chloride

b)

Magnesium with iron chloride

c)

Iron with Zinc Sulphate

d)

Gold with silver nitrate

13.

Oxidation is the _________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

14.

Reduction is the ___________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

15.

In the reaction; 2Ca(s) + O2(g) --> 2CaO(s), calcium is __________

a)

Reduced

b)

Synthesized

c)

Oxidized

d)

None of the above

16.

What is the substance that oxidizes another substance by accepting its electrons.

a)

Reducing agent

b)

Oxidation number

c)

Combustive agent

d)

Oxidizing agent

17.

What is the substance that reduces another substance by losing electrons.

a)

Reducing agent

b)

Half-reaction

c)

Electronegative atom

d)

Oxidizing agent

18.

What element rusts?

a)

Carbon

b)

Iron

c)

Manganese

d)

Potassium

19.

What prevents rusting?

a)

Painting

b)

Washing

c)

Dusting

d)

Sanding

20.

What is the chemical formula of rust?

a)

Fe2O3

b)

Fe2O3.H2O

c)

Fe2O3.xH20

d)

Fe(OH)2.xH2O

21.

Which of the followings is not a protection method of rusting?

a)

Galvanizing

b)

Electroplating

c)

Sacrificial metal

d)

Heating with carbon

22.

What metal in reactivity series is extracted by electrolysis?

a)

Iron

b)

Lithium

c)

Lead

d)

Gold

23.

Which method is the best to extract zinc from its ore?

a)

Heating with coal

b)

Electrolysis

c)

Mining from earth crust

d)

Heating with limestone

24.

What is the position of metal X in reactivity series in according to following reactions?

X(s) + 2 2HCl(aq) → XCl2(aq) + H2(g)

X(s) + CuSO4(aq) → XSO4(aq) + Cu(s)

X(s) + FeSO4(aq) → no reaction

a)

It is above iron

b)

Its between Cu and Fe

c)

Its between Au and H

d)

Its below hydrogen

25.

Oxidation is the _________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

26.

Reduction is the ___________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

27.

What is the oxidation number of nitrogen in N2?

a)

-3

b)

0

c)

+4

d)

-1

28.
What element is being Oxidized?
a)
N
b)
H
c)
O
d)
S
29.
What element is being Reduced?
a)
N
b)
H
c)
O
d)
S
30.
If an atom loses electrons during a chemical reaction, the atom was:
a)
Oxidized
b)
Reduced
c)
Neutralized
d)
Precipitated
31.
If in a reaction, copper is reduced; its number of electrons has:
a)
Increased
b)
Decreased
c)
Remained Constant
d)
Varies Randomly
32.

Gaining oxygen is an example of...

a)

oxidation

b)

reduction

33.

Which of the following represents oxidation?

a)

C → CH4

b)

Fe3+ → Fe2+

c)

Cl2 → 2Cl-

d)

Zn → ZnO

34.
Which of the following represents reduction?
a)
C →  CO
b)
N2 →  NH3
c)
Zn  →   Zn2+ 
d)
H2 →  H2O
35.
Which statement is true:
Mg → Mg2+ + 2e–
a)
Mg gains 2 electrons
b)
Mg2+ loses 2 electrons
c)
Mg loses 1 electron
d)
Mg loses 2 electrons
36.

Which element is oxidised in the reaction Zn + 2HCl  →\rightarrow   ZnCl2 + H2  \

a)

Zinc

b)

Hydrogen

c)

Chlorine

d)

None

37.

What element rusts?

a)

carbon

b)

manganese

c)

iron

d)

potassium

38.

What environmental element assists rusting?

a)

nitrogen

b)

oxygen

c)

carbon

d)

hydrogen

39.

A rusting bicycle

a)

physical change

b)

chemical change

40.

What conditions are required for rusting?

a)

dry cold conditions

b)

dry hot conditions

c)

hot damp conditions

41.

Rusting is an example of

a)

oxidation

b)

reduction

42.

What two things cause Iron to Rust ?

a)

Air and Oxygen

b)

Water and Carbon dioxide

c)

Oxygen and Water

d)

Carbon dioxide and Air

43.

What is the chemical name given to Rust ?

a)

Iron dioxide

b)

Iron oxide

c)

Steel oxide

d)

Carbon dioxide

44.

What prevents Rusting

a)

Painting , Oiling , Galvinising

b)

Washing with water

45.

Raising the temperature of a chemical reaction would make the reaction __________________.

a)

happen slower

b)

stop completely

c)

happen faster

d)

proceed as normal

46.
Which type of metal doesn't rust at all?
a)
steel
b)
iron
c)
copper
47.
How are metal oxides formed?
a)
When metals react with oxide.
b)
When metals react with water.
c)
When metals react with air.
d)
When metals react with oxygen.
48.
When metals are extracted from ores, a __________ reaction is used.
a)
oxidation.
b)
reduction.
c)
extraction
d)
mining
49.

In which tube will the nail go rusty?

a)

The nail in tube A will go rusty.

b)

The nail in tube B will go rusty.

c)

The nail in tube C will go rusty.

50.

Which factors affect the rate of a reaction?

a)

temperature

b)

concentration

c)

surface area

d)

pressure

e)

catalyst

51.

Why does a higher concentration increase the rate of reaction?

a)

it increases the amount of reactants

b)

it lowers the activation energy

c)

it increases the energy of particle collisions

d)

it increases the frequency of particle collisions

52.

Why does a higher temperature increase the rate of a reaction?

a)

it increases both the frequency and energy of particle collisions

b)

it only increases the frequency of particle collisions

c)

it only increases the energy of particle collisions

d)

it reduces the activation energy of the reaction

53.

Grinding a effervescent tablet into powder increases the rate of reaction due to increased

a)

concentration

b)

surface area

c)

temperature

d)

reactants

54.

Increasing the temperature gives particles more __________.

a)

Time

b)

Energy

c)

Space

d)

Frequency

55.

As the frequency of ______________ increases, the rate of reaction increases.

a)

Time

b)

Reactions

c)

Collisions

d)

Reactants

56.

Adding a catalyst ___________ the activation energy.

a)

Raises

b)

Lowers

c)

Doesn't affect

d)

Inreases

57.

The minimum amount of energy needed for colliding particles to react is called

a)

Chemical Energy

b)

Kinetic Energy

c)

Activation Energy

d)

Potential Energy

58.

Substance that changes the rate of a chemical reaction without being consumed in the reaction

a)

bonding

b)

catalyst

c)

chemical reaction

d)

activation energy

59.
What method can NOT be used to collect gas?
a)
Using a gas syringe
b)
Collecting it in a measuring cylinder under water
c)
Measuring the change in mass
d)
Seeing how quickly the solution goes cloudy
60.

Which graph shows the effect of increasing temperature on the rate of reaction of calcium carbonate with dilute hydrochloric acid?

a)
b)
c)
d)
61.

P, Q, R and S are pieces of apparatus.

Which row describes the correct apparatus for the measurement made?

a)

A

b)

B

c)

C

d)

D

62.
What type of reaction is this?
a)
Endothermic
b)
Exothermic
63.
The graph shows how the total volume of a gas given off from a reaction changes with time. In which time interval is least gas given off? 
a)
A
b)
B
c)
C
d)
D
64.
In an experiment, a 2 g lump of zinc and 2 g of powdered zinc are added separately to equal volumes of dilute sulphuric acid. The solid line on the graph shows the volume of gas given off when the 2 g lump is used. Which dotted line is obtained when the zinc is powdered? 
a)
A
b)
B
c)
C
d)
D
65.

Icing sugar has a greater ______ _____ than a solid cube of

sugar.

a)

Surface Area

b)

Catalyst

c)

Temperature

66.
A solution of hydrogen peroxide releases oxygen slowly at room temperature.
 hydrogen peroxide → water + oxygen
 The diagrams show the effect of adding blood to the solution. What could be the reason for the observed change? 
a)
Blood contains an enzyme. 
b)
Blood contains water. 
c)
The hydrogen peroxide becomes more concentrated. 
d)
The hydrogen peroxide is neutralised by blood. 
67.
A liquid X reacts with solid Y to form a gas.
Which two diagrams show suitable methods for investigating the speed of the reaction? 
a)
1 and 3
b)
1 and 4
c)
2 and 3
d)
2 and 4
68.
In which experiment is the rate of reaction between hydrochloric acid and calcium carbonate slowest? 
a)
A
b)
B
c)
C
d)
D
69.
A student investigated the rate of reaction of calcium carbonate with dilute hydrochloric acid. Every minute, the student recorded the total volume of carbon dioxide produced, until some time after the reaction was complete.
Which graph shows the correct results? 
a)
A
b)
B
c)
C
d)
D
70.
Identify where the reaction has finished
a)
A
b)
B
c)
C
d)
D
71.
Order the letters from highest to lowest rate of reaction.
a)
A > B > C > D
b)
A > BC > D (B and C have the same rate)
c)
A > B > CD (C and D have the same rate)
d)
D > C > B > A
72.
Identify the part of the graph with the fastest rate of reaction.
a)
A
b)
B
c)
C
d)
D
73.

Adding a catalyst ___________ the activation energy.

a)

Raises

b)

Lowers

c)

Doesn't affect

d)

Inreases

74.

Chemical reactions occur when reacting particles....

a)

collide

b)

pass

c)

interact

d)

are mixed

75.

The minimum energy particles must have to react is the

a)

acting energy

b)

active energy

c)

activation energy

76.

A reaction profile shows....

a)

the relative difference in temperature of reactants and products

b)

the relative difference in amounts of reactants and products

c)

the relative difference in energy of reactants and products

d)

the relative difference in volume of reactants and products

77.

Bond making is

a)

Endothermic

b)

Exothermic

78.

Bond breaking is..

a)

Endothermic

b)

Exothermic

79.

Which letter shows the activation energy

a)

A

b)

B

c)

C

80.

What is the definition of activation energy? Two answers are required.

a)

The energy needed to start a reaction

b)

The temperature needed to start a reaction

c)

The minimum energy that particles must have to react

d)

The maximum energy that particles must have to react.

81.

In a reaction the energy required to break bonds is less than the energy released when bonds are made. What type of reaction is this?

a)

Exothermic

b)

Endothermic

82.

How many molecules of water are there per unit of aluminum hydroxide in Al(OH)3.3H2O?

a)

1

b)

2

c)

3

d)

There is not enough information to know

83.

What name is given to a crystal that does not contain any water of crystallization?

a)

Dry

b)

Hydrated

c)

Insoluble

d)

Anhydrous

84.

What name is given to a crystal that contains water of crystallization?

a)

Wet

b)

Hydrated

c)

Soluble

d)

Aqueous

85.

What is the correct chemical formula for a compound of zinc sulfate containing 7 moles of water of crystallisation?

a)

ZnSO4.7H2O

b)

ZnSO4 + 7H2O

c)

ZnSO4 : 7H2O

d)

ZnSO4(7H2O)

86.

Which of the following statements best defines water of crystallization?

a)

The arrangement of water molecules around an ion.

b)

The amount of increase in size of a crystal when added to water.

c)

Molecules of water that are present in the lattice of a crystal.

d)

The minimum amount of water needed to completely dissolve a crystal.

87.

In an experiment, 10 g of red CoCl2·6H2O is heated in a crucible. After a while, the sample turns violet, and a mass of 6.97 g is recorded. Further heating produces a blue powder of anhydrous CoCl2 and a constant mass of 5.46 g is recorded. Which of the following statements may explain why the sample initially turns violet?

a)

During heating, only some of the hydrated water molecules are removed, producing a different hydrated compound but with fewer water molecules.

b)

During heating, CoCl2·6H2O reacts with oxygen in the air to produce CoO, which is a violet solid.

c)

During heating, there is an increase in the number of hydrated water molecules, producing a different hydrated compound but with more water molecules.

d)

Until the sample is heated to constant mass and only the blue CoCl2 remains there is a mixture of both the blue and red forms, which appears a violet colour.

88.

What is the % atom economy for the formation of ethane in the reaction above?

a)

100

b)

30

c)

28

d)

60

89.

Given the reaction:

CaCO3 → CaO + CO2

RAM: Ca = 40, C = 12, O = 16

Use the RAMs above to calculate the % atom economy for the formation of calcium oxide.

a)

56

b)

40

c)

44

d)

100

90.

Theoretical yield = 73g

Actual yield =62g

Calculate the percentage yield.

a)

1.16%

b)

116%

c)

85%

d)

76%

91.

What is the empirical formula of a substance with the molecular formula C2H4?

a)

C2H2

b)

C2H2

c)

C1H1

d)

CH2

92.

What is the empirical formula of a substance with the molecular formula NaCl?

a)

Na2Cl

b)

NaCl2

c)

NaCl

d)

Na2Cl2

93.

What is the empirical formula of a substance with the molecular formula X20Y15?

a)

X10Y15

b)

X5Y3

c)

X4Y3

d)

X20Y15

94.

What is the empirical formula of a substance with the molecular formula Se8F12?

a)

Se8F12

b)

Se2F3

c)

Se4F3

d)

SeF

95.

What is the molecular formula of this substance?

a)

C2H2

b)

C2H2

c)

C2H6

d)

CH2

96.

What is the empirical formula of this substance?

a)

SO

b)

SO2

c)

S2O2

d)

SiO2

97.

What is the Mr of the compound Na2SO4?

a)

142

b)

140

c)

71

d)

172

98.

What is the Mr of CO2?

a)

16

b)

12

c)

32

d)

44

99.

What is the Mr of SiO2?

a)

16

b)

28

c)

60

d)

44

100.

What is the empirical formula for hydrogen peroxide (H2O2)?

a)

H2O

b)

H2O2

c)

HO

d)

HO2

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