(a)[1]
State which of the substances is a reactant in photosynthesis.
(b)[1]
State which of the substances is the main constituent of bauxite.
(c)[2]
State which of the substances are the two products of fermentation.
(d)[1]
State which of the substances is used as a fuel.
(e)[1]
State which of the substances is a gas used to convert iron into steel.
(f)[1]
State which of the substances is a greenhouse gas.
(g)[1]
State which of the substances is a gas that makes up approximately 78% of clean, dry air.
(h)[1]
State which of the substances is an allotrope of carbon.