12.4.1 Simple tests for these elements
12.4.2 Trends in physical and chemical properties
12.4.3 Reactions of ionic halides
12.4.4 Acidity of HX and anomalous behaviour of HF
12.4.5 Oxidising properties of the halogens
12.4.6 Oxo anions 14. Describe the structures of chlorate(V) and chlorate(VII) ions.
12.4.7 Iodine in titrimetry
12.4.8 Triiodide ion