Chlorine and its compounds are essential for water treatment and the manufacture of domestic bleaching agents.
Which statement regarding the reactions and uses of chlorine is correct?
When chlorine reacts with cold, dilute, aqueous sodium hydroxide, a disproportionation reaction occurs in which the ratio of chlorine atoms oxidized to chlorine atoms reduced is 1:11:11:1.
In the presence of bright sunlight, the reaction of chlorine with water is altered such that the primary gaseous product is hydrogen.
Chlorine is added to drinking water despite the fact that the health risks from pathogens in untreated water are outweighed by the toxic risks of forming chlorinated organic compounds.
The reaction of chlorine with cold, dilute sodium hydroxide produces sodium chlorate(V), sodium chloride, and water.
37 exam-style questions on AQA A Level Chemistry Group 7(17), the halogens, covering Trends in properties and Uses of chlorine and chlorate(I). Each one has a worked solution and a mark scheme showing where the marks go.