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WorksheetsYear 7 - Reactions
Total questions: 56
Worksheet time: 44mins
Name
Class
Date
1.
Which of the following is an example of a chemical reaction?
a)
A marshmallow turning black when heated over a fire
b)
A powder dissolving in water to make lemonade
c)
An ice cube melting into a puddle of water
d)
Salt crystals being crushed into a powder
2.
You know you a chemical reaction has occurred if
a)
there is a precipitate.
b)
there is a color change.
c)
there is a temperature change.
d)
All of these answers are evidence.
3.
Which of the following is NOT an example of a chemical reaction?
a)
Wood Burning
b)
A cake baking in an oven
c)
Melting Ice Cream
d)
Mixing Vinegar and Baking Soda
4.
Which of the following substances contain acid?
a)
An orange
b)
Bleach
c)
Distilled water
d)
Washing powder
5.
Which of the following substances contain an alkali?
a)
Baking powder
b)
Coca cola
c)
Distilled water
d)
Vinegar
6.
Which of the following pH numbers indicates a neutral substance?
a)
1
b)
5
c)
7
d)
14
7.
Which of the following pH numbers indicates a strong acid?
a)
1
b)
5
c)
7
d)
14
8.
Which of the following pH numbers indicate a strong alkali?
a)
1
b)
5
c)
7
d)
14
9.
Which of the following acids do we have in our stomach?
a)
Ethanoic acid
b)
Hydrochloric acid
c)
Nitric acid
d)
Sulphuric acid
10.
What colour is universal indicator in strong acid?
a)
Green
b)
Orange
c)
Purple
d)
Red
11.
What colour is universal indicator in a neutral solution?
a)
Green
b)
Orange
c)
Purple
d)
Red
12.
What colour is universal indicator in a strong alkali?
a)
Green
b)
Orange
c)
Purple
d)
Red
13.
What colour is universal indicator in a strong alkali?
a)
Green
b)
Orange
c)
Purple
d)
Red
14.
Strong acids and strong alkalis are.......
a)
Able to turn blue litmus paper red
b)
Corrosive and/or caustic
c)
Sour
d)
Sweet
15.
What substance could you use to test if a substance is an acid or alkali?
a)
Indicator
b)
Salt
c)
Catalyst
d)
Water
16.
Indigestion medicine is taken to neutralise excess stomach acid. What type of substance is this medicine?
a)
Alkali
b)
Acid
c)
Neutral
17.
A solution with a pH of 3.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
18.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
19.
Bleach is a strong base, what is the pH level of bleach?
a)
13
b)
14
c)
1
d)
2
20.
What color does litmus paper turn in the presence of an acid?
a)
Red
b)
Blue
21.
According to the image, the substance tested is a...
a)
Acid
b)
Base
c)
Neutral
d)
Strong Acid
22.
One benefit of Red Cabbage Juice Indicator is that it...
a)
Tells you the exact pH
b)
Is very accurate
c)
It is very expensive
d)
It can be made from materials you have at home
23.
One benefit of a pH Meter is that it
a)
is very expensive
b)
only tells you if a substance is an acid or a base
c)
is very accurate
d)
can be made from substances you have at home
24.
Both solutions have equal volumes of 30 mL. Which solution is more diluted?
a)
Solution X
b)
Solution Y
25.
What is the reaction called between an acid and alkali
a)
Neutralisation
b)
Combustion
c)
Redox reaction
d)
Decomposition
26.
What are the names of the products when you mix an equal strength acid and alkali together?
a)
Water and Sodium Hydroxide
b)
Water and Salt
c)
Water and Hydrochloric Acid
d)
Water and Hydrochloric Acid
27.
Identify the 'tripod' from the diagrams.
a)
D
b)
E
c)
F
d)
G
28.
Identify the 'gauze' from the diagrams.
a)
D
b)
E
c)
F
d)
G
29.
Identify the 'heat proof mat' from the diagrams.
a)
E
b)
F
c)
G
d)
H
30.
Identify the 'conical flask' from the diagrams.
a)
A
b)
B
c)
C
d)
D
31.
Identify the 'bunsen burner' from the diagrams.
a)
E
b)
F
c)
G
d)
H
32.
Identify the 'evaporating basin' from the diagrams.
a)
A
b)
B
c)
C
d)
D
33.
Acid + Alkali�� �====>�� �________________What products are always formed from this reaction?
a)
a) Salt
b)
b) Salt + Water
c)
c) Salt + Hydrogen
d)
d) Salt + water + Carbon Dioxide
34.
Acid + Metal�� �====>�� �________________What products are always formed from this reaction?
a)
a) Salt
b)
b) Salt + Water
c)
c) Salt + Hydrogen
d)
d) Salt + water + Carbon Dioxide
35.
Element is a
a)
pure substance
b)
compound
c)
mixture
d)
molecule
36.
Is salt (NaCI) a compound or a element
a)
Compound
b)
element
37.
which one can be found on the periodic table
a)
Compound
b)
Element
38.
What is the symbol for Calcium
a)
Cl
b)
Ca
c)
Cm
d)
ca
39.
Where are the non-metallic elements found in the periodic table?
a)
In the middle
b)
In the top rows
c)
On the left-hand side
d)
On the right-hand side
40.
The list which contains only metals is .......
a)
aluminium, copper, nitrogen
b)
iron, oxygen, hydrogen
c)
iron, silver, aluminium
d)
iron, sulphur, copper
41.
A metal, such as platinum, may be used in jewellery as .......
a)
it is shiny and reactive
b)
it is shiny and unreactive
c)
it is soft and a good conductor of heat
d)
it is soft and cheap
42.
The list which best describes the properties of metals is .......
a)
strong, good conductor of heat and electricity, solid
b)
strong, poor conductor of heat and electricity, shiny
c)
weak, ductile, good conductor of heat and electricity
d)
weak, low melting point, poor conductor of heat
43.
What does malleable mean?
a)
able to bend
b)
will break easily
c)
can be used for wire
d)
is shiny
44.
What does ductile mean?
a)
electricity flows easily
b)
quacks like a duck
c)
can be drawn into a wire
d)
able to bend
45.
Is oxygen metal or nonmetal?
a)
metal
b)
nonmetal
46.
All of these properties describe metals EXCEPT...
a)
malleable
b)
conductors
c)
brittle
d)
luster
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.
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
49.
Which of the following reactions produces calcium oxide?
a)
calcium and oxide
b)
calcium and water
c)
calcium and air
d)
calcium and oxygen
50.
What is made when a metal reacts with an acid?
a)
salt + water
b)
salt + hydrogen
c)
salt + carbon dioxide
d)
salt + oxygen
51.
magnesium + nitric acid →
a)
Magnesium oxide
b)
magnesium nitrate + water
c)
Magnesium hydroxide + chlorine
d)
magnesium nitrate + hydrogen
52.
Metals that react quickly/strongly with water and acids are called?
a)
Reactive
b)
Unreactive
c)
Dangerous
d)
Corrosive
53.
How can you tell that a metal is reacting with water?
a)
Colour change
b)
Bright light
c)
Fizzing
d)
It gets colder
54.
What gas is always produced when a metal reacts with water?
a)
Oxygen
b)
Carbon dioxide
c)
Hydrogen
d)
Carbon monoxide
55.
Which metal is most likely to react with water or acid?
a)
Copper
b)
Potassium
c)
Magnesium
d)
Iron
56.
A displacement reaction will occur when...
a)
a more reactive metal displaces a less reactive metal from its compound.
b)
A less reactive metal displaces a more reactive metal from its compound
c)
Displacement only occurs when two of the same metals are reacted
d)
Displacement reactions will only occur in metals above iron in the reactivity series
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