Select one oxide from the list below to answer the questions.
CO
CO$_2$
CaO
CuO
Fe$_2$O$_3$
H$_2$O
SO$_2$
SiO$_2$
ZnO
Use each oxide no more than once, more than once, or not at all.
State which oxide:
(a)[1]
has no overall charge
(b)[1]
combines with calcium oxide to make slag in the blast furnace
(c)[1]
reacts with warm dilute hydrochloric acid to produce a blue-coloured solution
(d)[1]
shows amphoteric behaviour
(e)[1]
includes an ion whose oxidation number is $+3$
(f)[1]
removes the colour from acidified aqueous potassium manganate(VII).
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “$\text{H}_2\text{O}$” …