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WorksheetsReactivity series and metals
Total questions: 12
Worksheet time: 6mins
Why is the reaction between magnesium and copper oxide known as the thermite reaction?
It forms copper
Magnesium is less reactive than copper
It is a displacement reaction
It releases heat
Why are sulfate ions (SO4 2-) known as spectator ions in the following equation:
Zn + CuSO4 = ZnSO4 + Cu
They balance on both sides
They are unchanged on both sides
They are not needed in the reaction
They change on both sides of the reaction
Which of the following is an example of displacement reaction?
2 KClO3→KCl + O2
2H2 + O2 →2 H2O
Zn + 2 HCl → ZnCl2 + H2
N2 + 3 H2 → 2 NH3
How can you tell that a metal is reacting with water?
Colour change
Bright light
Fizzing
It gets colder
Which statement is true of a reducing agent?
It is oxidised as it gains electrons.
It is oxidised as it loses electrons.
It is reduced as it gains electrons.
It is reduced as it loses electrons.
What is the substance that loses oxygen in a redox reaction?
oxidizing agent
reducing agent
is oxidized
increases in oxidation number
When a gas changes iron(III) oxide to iron(II) oxide, the gas is
a combustible gas
a reducing agent
an inert gas
an oxidising agent
What is the colour change of acidified KMnO4(aq) solution as a test for reducing agents?
From green to orange
From orange to green
From purple to colourless
From colourless to purple
What is the oxidizing agent of this reaction?
3Mg + N2 → Mg3N2
Mg
Mg3N2
MgN
N2
A chemical engineer plans to produce hydrochloric acid, which metal is best for the reaction container?
iron
magnesium
copper
zinc
How can you tell that a metal is reacting with water?
Colour change
Bright light
Fizzing
It gets colder
What type of reaction is the following:
HCl + Zn --> ZnCl2 + H2
Neutralisation
Acid and a metal
Acid and a carbonate
Ionic
