Chemistry 0620 · IGCSE · Elements, compounds and mixtures

Elements, compounds and mixtures — practice question

The substances below are listed. bauxite carbon dioxide cryolite ethane ethanol ethene graphite helium hematite hydrogen silicon(IV) oxide sodium chloride Use only the substances from this list to answer the questions. A substance may be chosen once, more than once, or not chosen at all.
(a)[1]

State which substance is made by fermentation.

(b)[1]

State which substance is made up of single atoms.

(c)[1]

State which substance is a reactant in photosynthesis.

(d)[1]

State which substance acts as a solvent in the extraction of aluminium.

(e)[1]

State which substance is an iron ore.

(f)[1]

State which substance is manufactured from methane.

(g)[1]

State which substance is a compound with a giant covalent structure.

(h)[1]

State which substance is used as a lubricant.

(i)[1]

State which substance is detected with limewater.

Worked solution & mark scheme

This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: carbon dioxide OR ethanol

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