Pick one item from the list below to respond to the questions.
anhydrous copper(II) sulfate
calcium carbonate
carbon monoxide
chlorine
ethanoic acid
iron
methanoic acid
methanol
nickel
silicon(IV) oxide
vanadium(V) oxide
A substance may be selected once, selected several times, or not selected at all.
(a)[1]
State which substance acts as the catalyst in the Contact process.
(b)[1]
State which substance functions as a reducing agent in the blast furnace.
(c)[1]
State which substance changes from a white solid into a blue solid when water is added.
(d)[1]
State which substance destroys microbes during treatment of the domestic water supply.
(e)[1]
State which substance has the empirical formula $\text{CH}_2\text{O}$.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “vanadium pentoxide” …