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