Which word equation represents a reaction that occurs?
sodium oxide + carbon → sodium + carbon dioxide
sodium oxide + iron → sodium + iron (II) oxide
iron(II) oxide + copper → iron + copper(II) oxide
iron(III) oxide + carbon → iron + carbon dioxide
A metal M is between sodium and magnesium in the reactivity series.
Which reactions occur with M and its oxide?
M reacts with steam
M can be extracted
by heating its oxide
with carbon
no
no
no
yes
yes
no
yes
yes
Four metals, Q, R, S and T, are each added to separate samples of water, steam and dilute hydrochloric acid.
The results are shown.
Which statements are correct?
1 R is the least reactive metal.
2 T could be potassium.
3 S is more reactive than Q and R.
4 Metals generally react faster with steam than they react with water.
1, 2 and 4
1 and 2 only
2 and 3
3 and 4
An iron nail is added to aqueous copper(II) sulfate and a different iron nail is added to aqueous magnesium sulfate.
The results are shown.
Which statement is correct?
Copper atoms are oxidised more easily than magnesium atoms.
Copper atoms are reduced more easily than iron ions.
Iron atoms are oxidised more easily than copper atoms.
Iron atoms are reduced more easily than copper ions.
Aluminium objects do not need protection from corrosion.
Iron objects must be protected from corrosion.
Which statement explains why aluminium resists corrosion?
Aluminium does not form ions easily.
Aluminium does not react with water or air.
Aluminium has a protective oxide layer.
Aluminium is below iron in the reactivity series.