Chemistry 0620 · IGCSE · Elements, compounds and mixtures
Elements, compounds and mixtures — practice question
The substances below are listed by formula.
Al Ag CaCO$_3$ CH$_4$ Cl$_2$ Cu SO$_2$
Use only these substances to answer the questions.
A substance may be chosen once, more than once, or not chosen at all.
(a)[1]
State which substance is used in the manufacture of food containers.
(b)[1]
State which substance is added to a blast furnace to remove impurities in iron production.
(c)[1]
State which substance is the chief constituent of natural gas.
(d)[1]
State which substance is responsible for acid rain.
(e)[1]
State which substance is a gas that bleaches damp litmus paper.
(f)[1]
State which substance is a gas that contributes to climate change.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Al or aluminium” …