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WorksheetsChemical reactions
Total questions: 40
Worksheet time: 42mins
Name
Class
Date
1.
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
2.
Which type of chemical reaction breaks large molecules down into 2 or more substances?
a)
Corrosion
b)
Oxidation
c)
Neutralisation
d)
Decomposition
3.
Identify the type of reaction:
Calcium + Oxygen --> Calcium Oxide
Calcium + Oxygen --> Calcium Oxide
a)
Decomposition
b)
Oxidation
c)
Reduction
d)
Combustion
4.
The substances at the beginning of a chemical equation are called the ____
a)
product
b)
yield
c)
chemical symbol
d)
reactants
5.
The substances formed at the end of a chemical equation are called the ____
a)
products
b)
yield
c)
chemical symbol
d)
reactants
6.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
7.
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
8.
Which one of the following Would the following 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
9.
When metal reacts with liquid water the products are...
a)
metal hydroxide and oxygen gas
b)
metal hydroxide and hydrogen gas
c)
metal oxide and oxygen gas
d)
metal oxide and hydrogen gas
10.
The family in the periodic table that contains the most reactive metals is the_______
a)
Alkaline Earth Metals
b)
Transition Metals
c)
Alkali Metals
d)
Other Metals
11.
Which of the following will not undergo reaction?
a)
zinc metal + zinc oxide
b)
iron metal + copper oxide
c)
zinc metal + iron oxide
d)
magnesium + iron oxide
12.
Metals that react quickly/strongly with water and acids are called?
a)
Reactive
b)
Unreactive
c)
Dangerous
d)
Corrosive
13.
Which gas is required for something to burn?
a)
Carbon dioxide
b)
Hydrogen
c)
Oxygen
d)
Water
14.
What is made when magnesium reacts with hydrochloric acid?
a)
magnesium nitrate and hydrogen gas
b)
magnesium sulfate and hydrogen gas
c)
magnesium oxide and oxygen gas
d)
magnesium chloride and hydrogen gas
15.
An acid reacts with metal to produce
a)
Carbon dioxide
b)
Hydrogen gas
c)
Hydrogen gas and water
d)
A salt and hydrogen gas
16.
A neutralisation reaction is a reaction between
a)
Acid and a Base
b)
Acid and water
c)
Base and water
d)
None of the above
17.
An acid reacts with a metal carbonate to produce
a)
Salt, water and hydrogen gas
b)
Salt, water and carbon dioxide
c)
Limewater
d)
Salt and water
18.
Complete the following reaction:
Sulphuric acid + sodium carbonate -->
Sulphuric acid + sodium carbonate -->
a)
Carbon dioxide + water
b)
calcium carbonate + water + carbon dioxide
c)
Sodium sulphate + water + carbon dioxide
d)
Sodium chloride + water + carbon dioxide
19.
What type of reaction is the following:
Hydrochloric acid + Zinc --> Zinc Chloride + Hydrogen
Hydrochloric acid + Zinc --> Zinc Chloride + Hydrogen
a)
Neutralisation
b)
Acid and a metal
c)
Acid and a carbonate
d)
Ionic
20.
What gas is produced when sodium reacts with water?
a)
Hydrogen
b)
Carbon dioxide
c)
Carbon monoxide
d)
Water vapour
21.
Name the salt produced when reacting potassium hydroxide and phosphoric acid?
a)
Potassium chloride
b)
potassium nitrate
c)
potassium sulfate
d)
potassium phosphate
22.
A salt is formed when nitric acid combines with sodium hydroxide. What is the name of the salt?
a)
Sodium chloride
b)
Sodium nitrate
c)
Hydrogen Nitrate
d)
Nirate
23.
If you combine an acid and a base, this occurs.
a)
acidification
b)
basification
c)
neutralisation
d)
negativation
24.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
25.
In an endothermic reaction, heat is ,,,
a)
taken in
b)
given out
26.
What is a Chemical Reaction?
a)
When two liquids hit each other
b)
When a liquid has foam
c)
When two substances mix and have a reaction
d)
When a reaction forms with soda and candy
27.
Another name for a "oxidation-reduction" reaction is
a)
chemical reaction
b)
neutralization reaction
c)
redox reaction
d)
nuclear reaction
28.
In the reaction
Zinc + water --> Zinc Oxide + Hydrogen
which element, if any, is oxidised?
Zinc + water --> Zinc Oxide + Hydrogen
which element, if any, is oxidised?
a)
Zinc
b)
Hydrogen
c)
Oxygen
d)
None
29.
What type of reaction occurs when potassium manganate (VII) is heated?
a)
Oxidation
b)
Neutralisation
c)
Thermal decomposition
d)
Combustion
30.
What type of reaction occurs when hydrogen peroxide is dripped onto a manganese oxide catalyst?
a)
Oxidation
b)
Neutralisation
c)
Thermal decomposition
d)
Decompostion
31.
What type of reaction occurs when an iron nail is placed in a test tube with copper sulphate solution?
a)
Displacement
b)
Neutralisation
c)
Thermal decomposition
d)
Decompostion
32.
What two substances are required in order for iron to rust?
a)
oxygen only
b)
water only
c)
boiled water and oil
d)
oxygen and water
33.
Corrosion occurs when a metal is exposed to oxygen and other enviromental influences such as water vapour.
a)
True
b)
False
34.
A metal higher up in the reactivity series can displace a metal lower down in the reactivity series from its salt.
a)
True
b)
False
35.
In an oxidation reaction, a substance loses oxygen.
a)
True
b)
False
36.
In a reduction reaction a substance loses oxygen.
a)
True
b)
False
37.
Acid + Alkali ==> A Salt + Water
is an example of....?
is an example of....?
a)
Corrosion
b)
Displacement
c)
Neutralisation
d)
Decomposition
38.
An element which will form an acidic oxide could be
a)
carbon
b)
calcium
c)
cobalt
d)
copper
39.
An element which will form an insoluble basic oxide could be
a)
carbon
b)
sulphur
c)
iron
d)
nitrogen
40.
An element which will form a soluble basic oxide could be
a)
carbon
b)
sodium
c)
iron
d)
tin
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