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Worksheets

Stage 5 Chemistry

Total questions: 50

Worksheet time: 2hrs 40mins

Name
Class
Date
1.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
2.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
3.
If a pH is too alkaline, what can be added to make the pH more acidic?
a)
Sulfuric Acid
b)
Sodium Hydroxide
c)
Water
d)
Calcium Carbonate
4.
A solution with a pH of 8.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
5.
A solution with a pH of 3.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
6.
A pH of 14 is a .....
a)
strong acid
b)
weak acid
c)
Strong base
d)
Weak base
7.
The Law of Conservation of Mass states
a)
that matter exists in all states and reacts the same
b)
that matter can only be changed into new substances by introducing a catalyst
c)
that matter exists in the same state throughout any chemical change
d)
that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants
8.

How many total atoms are written here?


6MgF2

a)

3

b)

6

c)

12

d)

18

9.

___________________ are the elements are compounds that leave (are formed in) a chemical reaction.

a)

Polymers

b)

Bonds

c)

Reactants

d)

Products

10.

If I suspect carbon dioxide is a product of a reaction, to test for the gas I could ...

a)

Bubble it through limewater and it will go milky

b)

do the pop test and it will burn

c)

Light a taper and it will burn brighter

d)

note the colour change to yellow

11.
In a chemical reaction, bonds are broken and new bonds are formed that create new substances. The bonds that are broken are called what?
a)
Reactants
b)
Products
c)
Atoms
d)
Catalysts
12.
What is the left part of a chemical equation called?
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
13.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
14.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
15.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
16.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
17.
Is the following equation balanced?...
Al + O2 --> 2Al2O3
a)
Yes!
b)
No!
18.
Which of the following reactions is balanced?
a)
2CH4 + O2 -> CO2 + H2O
b)
CH4 + 2O2 -> CO2 + H2O
c)
CH4 + 2O2 -> CO2 + 2H2O
d)
None of the chemical equations are balanced.
19.
How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
20.
a substance formed when two or more elements are chemically bonded together
a)
Element Soup
b)
Pure Element
c)
Ion
d)
Compound
21.

a process or reaction in which the system absorbs energy from its surroundings; usually, but not always, in the form of heat which makes it feel cold

a)

Endothermic Reaction

b)

Exothermic Reaction

c)

Corrosion

d)

Precipitation

22.
a chemical reaction that releases energy by light or heat
a)
Endothermic Reaction
b)
Exothermic Reaction
c)
Diffusion
d)
Fission
23.
type of reaction in which a compound is broken down into its simple elements
a)
Double Displacement
b)
Single Displacement
c)
Synthesis
d)
Decomposition
24.
type of reaction in which two or more elements combine to form a more complex compound
a)
Double Displacement
b)
Single Displacement
c)
Synthesis
d)
Decomposition
25.
Which is the name of the kind of solid substance formed in this figure?  
a)
aqueous 
b)
precipitate
c)
acid
d)
synthesis 
26.

Which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water?

a)

double replacement

b)

decomposition

c)

combustion

d)

corrosion

27.
Provides evidence that a chemical reaction has occurred. 
a)
dissolving 
b)
melting
c)
formation of a gas
d)
bending
28.

What is the type of reaction shown above?

a)

Synthesis

b)

Decomposition

c)

Precipitation

d)

Neutralisation

29.

Identify the reaction type:

C2H6 + O2 --> CO2 + H2O

a)

Corrosion

b)

Synthesis

c)

Neutralisation

d)

Combustion

30.

Identify the reaction type for the following equation:

K + F2 --> KF

a)

Neutralisation

b)

Precipitation

c)

Synthesis

d)

Decomposition

31.

Which of the following is an neutralisation reaction?

a)

2Na + Cl2 → 2NaCl

b)

CH4 + 2O2 → CO2 + 2H2O

c)

HCl + KOH → KCl + H2O

d)

CaCO3 → CO2 + CaO

32.

Identify the reaction type:

H2O2 --> H2O + O2

a)

Decomposition

b)

Synthesis

c)

Combustion

d)

Neutralisation

33.

The picture above is a signage for dangerous good Class 5. Substances under this class are usually:

a)

oxidising substances that readily yields oxygen and cause other materials to combust

b)

readily ignite and burn explosively, some spontaneously

c)

Pose harm from inhalation, ingestion, absorption

d)

cause disintegration of tissues, external fuming potential

34.

Which of the following substances follow the signage above?

a)

Liquified Petroleum Gas

b)

Hydrocyanic Acid

c)

Biohazard material

d)

Plutonium

35.

Radioactive materials are under class:

a)

6

b)

7

c)

8

d)

9

36.

Corrosive substances are under class:

a)

8

b)

7

c)

6

d)

5

37.

Flammable liquids are liquids, or mixtures of liquids, or liquids containing solids in solution or suspension (for example paints, varnishes, lacquers, etc., but not including substances otherwise classified on account of their other dangerous characteristics.

a)

Class 1

b)

Class 2

c)

Class 3

d)

Class 4

38.

What does this symbol mean if found as a label on a substance?

a)

Explosive

b)

Flammable

c)

Set this on fire

d)

Oxidising

39.

What does this symbol stand for?

a)

Flammable

b)

Oxidising

c)

Non-flammable

d)

Explosive

40.

What does this symbol stand for?

a)

Flammable

b)

Oxidising

c)

Irritant

d)

Corrosive

41.

What does this symbol stand for?

a)

Flammable

b)

Toxic

c)

Deadly

d)

Corrosive

42.

This symbol tell us the chemical it is labelling is:

a)

Harmful to the environment

b)

A pressurised container

c)

Explosive

d)

Corrosive

43.

This symbol would be seen on which of the following

a)

Radioactive substance

b)

Waste bin of used vaccinations

c)

Cancer patient

d)

Petroleum

44.

A reaction between an acid and a base is called

a)

Neutralisation

b)

Precipitation

c)

Combustion

d)

Corrosion

45.

Which types of reaction are classified as 'oxidation' reactions?

a)

Precipitation

b)

Corrosion

c)

Neutralisation

d)

Combustion

46.

Acid + Base -->

a)

Salt + hydrogen gas

b)

Salt + water

c)

Carbon dioxide + water

d)

Salt + precipitate

47.

Which gas test should I use to check for hydrogen gas as a product of a reaction?

a)

pop test

b)

burning splint test

c)

limewater test

d)

fire extinguisher test

48.

Which test should I use to test for the presence of oxygen gas as a product?

a)

pop test

b)

burning splint test

c)

limewater test

d)

fire blanket test

49.

A metal reacting with oxygen in the presence of water is

a)

precipitation

b)

decomposition

c)

combustion

d)

corrosion

50.

The energy required to begin a chemical reaction is know as

a)

initiation energy

b)

kinetic energy

c)

activation energy

d)

commencement energy

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