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End of Topic Quiz: Chemical Reactions

Total questions: 72

Worksheet time: 1hrs 3mins

Name
Class
Date
1.

Combining substances to form new substances is called

a)

Chemical reaction

b)

Physical reaction

c)

Exothermic reaction

d)

Endothermic reaction

2.

Reaction where heat is released.

a)

Chemical reaction

b)

Physical reaction

c)

Exothermic reaction

d)

Endothermic reaction

3.

What is the conservation of matter?

a)

A place to preserve wildlife

b)

A non-liberal person

c)

Matter cannot be created or destroyed

d)

An object at rest stays at rest unless acted upon by an unbalanced force

4.
Provides evidence that a chemical reaction has occurred. 
a)
dissolving 
b)
melting
c)
formation of a gas
d)
bending
5.

What is the part of the chemical equation in green called?

Fe + S → FeS

a)

products

b)

reactants

c)

yield

d)

input

6.

When coal burns carbon dioxide is produced from the carbon in coal and the oxygen in air. Which of these is the best evidence that a chemical reaction occurs when coal burns?

a)

The shape of the coal changes

b)

Oxygen is present

c)

A new substance is produced

d)

Coal is made up of more than one element

7.
A candle wick burning is an example of a _________________________
a)
physical reaction
b)
condensation
c)
neutrons
d)
chemical reaction
8.
The substances listed on the right side of a chemical equation are the
a)
Yields
b)
Reactants
c)
Products
d)
Precipitates
9.
A different chemical substance is formed when _____.
a)
water boils
b)
metal rusts
c)
ice melts
d)
rock is crushed
10.

CH4CH_4  

How many HYDROGEN atoms are in this compound?

a)

1

b)

2

c)

3

d)

4

11.

Which of these is not a sign of a chemical reaction?

a)

heat and light produced

b)

gas production

c)

color change

d)

stagnation of chemicals

12.

What three things are needed for a combustion reaction to occur?

a)

solid, liquid, gas

b)

fuel, oxygen, heat source

c)

heat source, carbon, container

d)

aqueous, solid, fuel

13.

A chemical reaction in which energy is absorbed/taken in is _______

a)

Exothermic

b)

Endothermic

c)

Thermal

d)

Chemical

14.

Check all of the exothermic examples.

a)

Fireworks exploding

b)

Photosynthesis

c)

Splitting water

d)

Coal burning

15.

Choose all of the endothermic reactions.

a)

Coal Burning

b)

A puddle of water evaporating

c)

Sparklers burning

d)

Plants absorbing sunlight during photsynthesis

16.

A snowman melting is an example of which process?

a)

Endothermic

b)

Exothermic

c)

Conservation of Energy

d)

Chemical reaction

17.

Check all of the examples of an Exothermic Process involving water.

a)

Freezing

b)

Melting

c)

Condensation

d)

Evaporation

18.

Check all of the examples of an Endothermic Process involving water.

a)

Freezing

b)

Melting

c)

Condensation

d)

Evaporation

19.

In an endothermic reaction, heat is ...

a)

taken in

b)

given out

20.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
21.

6. Which of these processes is always exothermic?

a)

A. evaporation

b)

B. burning

c)

C. insulation

d)

D. melting

22.

4. Equal amounts of four different substances (A-D) where added separately to equal amounts of an acid and a thermometer placed in the mixture. For which substance is the reaction the least endothermic?

a)

A. temperature falls by 3 °C\degree C    

b)

B. temperature rises by 5 °C\degree C

c)

C. temperature falls by 5 °C\degree C

d)

D. temperature rises by 3 °C\degree C

23.

1. Equal amounts of four different substances (A-D) where added separately to equal amounts of an acid and a thermometer placed in the mixture. For which substance is the reaction the most exothermic?

a)

A. temperature rises by 3 °C\degree C    

b)

B. temperature falls by 5 °C\degree C   

c)

C. temperature falls by 3 °C\degree C    

d)

D. temperature rises by 5 °C\degree C  

24.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
25.
During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______. 
a)
Warm
b)
Cold
26.
Baking bread and cooking an egg are examples of....?
a)
Endothermic processes
b)
Exothermic processess
c)
None of these 
27.
What type of reaction is shown in the photo?
a)
Exothermic
b)
Isothermic
c)
Endothermic
d)
None of the  above
28.

What type of reaction occurs in a hand warmer?

a)

exothermic

b)

endothermic

29.
Is photosenthysis an Exothermic or an Endothermic reaction?
a)
Endothermic
b)
Exothermic
30.

5. When ammonium chloride dissolves in water the temperature falls. The type of energy change is described as?

a)

A. exothermic    

b)

 B. activated  

c)

C. decomposition            

d)

D. endothermic

31.

A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?

a)

It is an exothermic reaction

b)

It is an endothermic reaction

32.
Another term for burning is
a)
Fire triangle
b)
Magnesium oxide
c)
Combustion
d)
Bustion
33.

Why do we burn a fuel?

a)

To have fun

b)

To release energy

c)

To lose energy

d)

To produce carbon dioxide

34.
Is combustion a reversible reaction?
a)
Yes.
b)
No.
35.

Diagram shows an investigation about rusting.

R - The iron nail will rust

S -The iron nail not rust

T - The iron nail will float on the water

U- The iron nail will change the colour

Which of the following occur after a day?

a)

R and T

b)

S and T

c)

R and U

d)

S and U

36.

Diagram shows an investigation about rusting.

R - The iron nail will rust.

S - The iron nail will not rust.

T - The iron nail will float on the water.

U- The iron nail will change the colour.

Which of the following occur after a day?

a)

R and T

b)

S and T

c)

R and U

d)

S and U

37.

In which container the nails rust fastest?

a)

A

b)

B

c)

C

d)

D

38.

An experiment has been carried out by a group of pupils. The results of the experiment are recorded in Table 2.


What can be concluded from this experiment?

a)

Nail X did not rust because exposed to the air and water.

b)

Nail Y rust because exposed to the air and water.

c)

Nail X did not rust because exposed to the oil layer.

d)

Nail Z did not rust because exposed to water.

39.

A layer of reddish brown on surface of a metal is called

a)

red paint

b)

red dirt

c)

rust

d)

brown rust

40.

What are the factors that causes rusting

a)

presence of water and oil

b)

presence of water and carbon dioxide

c)

presence of boiled water and oxygen

d)

presence of water and oxygen

41.

Rusting happens more faster when the humidity is high.

a)

True

b)

False

42.

How do you prevent cycle chain from rusting?

a)

apply oil or grese

b)

painting

c)

plating iron with a layer of non rusty metals

d)

coating with plastic

43.

Which nails will rust after one week?

a)

A

b)

B

c)

C

d)

D

44.

What is the function of the oil layer in test tube C?

a)

prevent the air from going out

b)

prevent air going inside

c)

absorbs the air in the water

d)

protect the nail from rusting

45.

Does boiled water contain air?

a)

Yes

b)

No

46.

Which metal rusts?

a)

Copper

b)

manganese

c)

iron

d)

potassium

47.

What is the chemical name given to rust?

a)

Iron dioxide

b)

Iron oxide

c)

Steel oxide

d)

Carbon dioxide

48.

What prevents rusting?

a)

Painting, Oiling, Galvanizing

b)

Washing with water

c)

Leaving it outside

d)

Adding salt

49.

What is the function of the anhydrous calcium chloride in this investigation?

a)

To protect the iron nail

b)

To increase the rate of the rusting process

c)

To absorb the moisture in the air

d)

To supply oxygen in the test tube

50.

Rusting is a reversible change.

a)

True

b)

False

51.
Which of the following is the product of the reaction of aluminium and oxygen?
a)
aluminium oxide.
b)
metal oxide
c)
aluminium ore
d)
aluminium and oxygen
52.
Which of the following reactions produces calcium oxide?
a)
calcium and oxide
b)
calcium and water
c)
calcium and air
d)
calcium and oxygen
53.
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.
54.

In this chemical reaction, which is the product/s?

Magnesium + Oxygen --> Magnesium oxide

a)

magnesium

b)

magnesium and oxygen

c)

magnesium oxide

d)

oxygen

55.
Which of the following defines oxidation?
a)
A chemical reaction where a substance gains oxygen.
b)
A chemical reaction where a substance loses oxygen.
c)
A chemical reaction where a substance loses a metal.
d)
A chemical reaction where a substance gains a metal.
56.
How can you tell that a metal is reacting with water?
a)
Colour change
b)
Bright light
c)
Fizzing
d)
It gets colder
57.
How can you test to show that when a metal reacts with water, hydrogen gas is produced?
a)
Relights a glowing splint
b)
A lit splint produces a squeaky pop
c)
Puts out a burning splint
d)
Is cold to the touch
58.

Complete the general equation:

Metal + Acid ->

a)

Salt + Water

b)

Salt + Hydrogen

c)

Salt

59.

Complete the general equation:

Metal + Water ->

a)

Salt + Water

b)

Metal Hydroxide + Hydrogen

c)

Metal hydroxide + Water

d)

Salt + Hydrogen

60.

Complete the equation:

Sodium + Hydrochloric Acid ->

a)

Sodium Hydroxide + Hydrogen

b)

Sodium Chloride + Hydrogen

c)

Chloric Sodium + Hydrogen

d)

Sodium Chloride + Water

61.

Complete the equation:

Potassium + Nitric Acid ->

a)

Potassium Hydroxide + Hydrogen

b)

Potassium Chloride + Hydrogen

c)

Potassium Nitrate + Hydrogen

d)

Nitric Potassium + Hydrogen

62.
What gas is produced when sodium reacts with water?
a)
Hydrogen
b)
Carbon dioxide
c)
Carbon monoxide
d)
Water vapour
63.

Complete the equation:

Potassium + Water ->

a)

Potassium Hydroxide + Hydrogen

b)

Potassium Chloride + Hydrogen

c)

Potassium Hydroxide + Water

d)

Nitric Potassium + Hydrogen

64.
Which salt will be produced if magnesium react with hydrochloric acid?
a)
Magnesium oxide
b)
Magnesium sulfate
c)
Magnesium sulfide
d)
Magnesium chloride
65.

A student was investigating the reactivity of different metals in hydrochloric acid.

What must the student keep constant in this investigation to make it a fair experiment?

a)

mass of metal concentration of acid

b)

volume of acid length of metal

c)

size of metal temperature of acid

d)

temperature of the room type of acid

66.
Metals that react quickly/strongly with water and acids are called?
a)
Reactive
b)
Unreactive
c)
Dangerous
d)
Corrosive
67.
The alkali metals are in group 1, on the far left of the periodic table. Which of these is NOT an alkali metal?
a)
Lithium
b)
Iron
c)
Potassium
d)
Francium
68.
What else is produced when a metal reacts with water? (HINT: Water has the formula H2O)
a)
Metal Oxide
b)
Metal Carbonate
c)
Metal Hydride
d)
Metal Hydroxide
69.
When sodium reacts with hydrochloric acid, what is the name of the salt formed?
a)
Sodium Hydride
b)
Sodium Chloride
c)
Sodium Hydrochloric
d)
Sodium Chlorine
70.
When potassium reacts with sulphuric acid, what is the name of the salt produced?
a)
Potassium Sulphide
b)
Potassium Sulphur
c)
Potassium Sulphuric
d)
Potassium Sulphate
71.
When magnesium reacts with copper sulphate, there are two products. What are they?
a)
Magnesium  and Copper
b)
Magnesium Sulphate and Copper
c)
Magnesium Sulphate and Copper Sulphate
d)
Magnesium and Copper Sulphate
72.
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 Sulphate never reacts with metals

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