WorksheetsGrade 8 Term 3 Quiz
Total questions: 24
Worksheet time: 22mins
When you 'burn' a reactant, what are you reacting it with?
water
oxygen
air
hydrogen
All chemical reactions:
create new substances
change the states of the reactants
have at least two reactants
are not reversible
The substances that react in a chemical reaction are called:
products
chemicals
reactants
molecules
The substances that are made in a chemical reaction are called:
reactants
products
chemicals
molecules
What do we call the type of reaction that takes place between magnesium and oxygen?
A displacement reaction
An oxygen reaction
A magnesium reaction
A combustion reaction
What do we call the type of reaction that takes place between an acid and an alkali?
A displacement reaction
A neutralisation reaction
A magnesium reaction
A combustion reaction
Iron + Oxygen -> ____ _____
(a)
(a) + oxygen -> calcium oxide
metal + oxygen -> _____ _____
(a)
non-metal + oxygen -> _________ _______
(a)
sulfur + oxygen -> ______ _______
(a)
carbon + (a) -> carbon dioxide
Why, if you heat carbon in air, does its mass decrease?
acid + alkali -> (a) + water
acid + metal oxide -> (a) + water
hydrochloric acid + sodium hydroxide -> sodium chloride + (a)
sulfuric acid + ______ _____ -> copper sulfate + water
(a)
In this equation, what are the names of the reactants?
copper oxide + hydrochloric acid -> copper chloride + water
copper oxide
hydrochloric acid
copper chloride
water
In this equation, what are the names of the products?
copper oxide + hydrochloric acid -> copper chloride + water
copper oxide
hydrochloric acid
copper chloride
water
Where do corrosion reactions take place?
On the surface of a metal
Anywhere in a metal
On the surface of a non-metal
Anywhere in a non-metal
What do we call the corrosion reaction with iron?
verdigris
corrosion
oxigenation
rust
Iron corrosion reactions are as follows:
Iron + (a) + water -> hydrated iron oxide
When copper reacts with carbon dioxide it creates copper carbonate which has a characteristic (a) colour.
Silver reacts with _______ ______ in polluted air. This creates a black compound on the surface of the silver.
(a)
