Chemistry 5070 · O Level · Elements, compounds and mixtures
Elements, compounds and mixtures — practice question
Pick your responses from the substances listed below when answering the questions.
carbon
chlorine
glucose
hydrated copper(II) sulfate
iron
magnesium sulfate
methanoic acid
methanol
nickel
silicon(IV) oxide
vanadium(V) oxide
Each substance may be used once, more than once, or not used at all.
State which substance:
(a)[1]
serves as a catalyst in the Haber process
(b)[1]
is a substance with a giant covalent structure
(c)[1]
turns from a blue solid into a white solid on heating
(d)[1]
removes tastes and odours from the domestic water supply during treatment
(e)[1]
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: “iron (Fe)” …