A list of substances is shown:
bauxite, carbon dioxide, cryolite, ethane, ethanol, ethene, graphite, helium, hematite, hydrogen, silicon(IV) oxide, sodium chloride
Answer the following questions using only the substances from the list. Each substance may be used once, more than once or not at all.
State which substance:
(a) is manufactured by fermentation
(b) is monatomic
(c) is a reactant in photosynthesis
(d) is a solvent in the extraction of aluminium
(e) is an ore of iron
(f) is manufactured from methane
(g) is a compound with a giant covalent structure
(h) is used as a lubricant
(i) is tested for with limewater
