(a)[2]
Water must be treated so that it is safe to drink. Draw a line from each stage in domestic water treatment to the reason it is carried out.
(b)[2]
Describe how to test whether a sample of water is pure using melting point.
(c(i))[2]
Air can contain sulfur dioxide and particulates. State one harmful effect of each of these air pollutants.
(c(ii))[2]
Describe how flue gas desulfurisation lowers emissions of sulfur dioxide gas.