(a)[1]
the principal constituent of natural gas
(b)[1]
a reactant used in respiration
(c)[1]
the principal constituent of bauxite
(d)[1]
a product formed in photosynthesis
(e)[1]
a greenhouse gas
(f)[1]
an example of a macromolecular solid
Chemistry 0620 · IGCSE · Elements, compounds and mixtures
Elements, compounds and mixtures — practice question
Eight substances are listed below.
aluminium oxide calcium oxide ethanol nitrogen
iron(III) oxide methane oxygen silicon(IV) oxide
Use the substances to answer the questions that follow.
A substance may be selected once, more than once, or not selected at all.
State which substance is: