Question

What types of oxoacids are formed by halogens? Mention the oxidation states of halogens in them.

Answer 1

Fluorine forms only one oxoacid, hypofluorous acid (HOF). Chlorine, bromine and iodine form the following four types of oxoacids:

1. Hypohalous acids (HXO)
2. Halous acids (HXO₂)
3. Halic acids (HXO₃)
4. Perhalic acids (HXO₄)

Oxidation state of halogen atom	Oxoacids of chlorine	Oxoacids of bromine	Oxoacids of iodine
+1	HClO (Hypochlorous acid)	HBrO (Hypobromous acid)	HIO (Hypoiodous acid)
+3	HClO2 (Chlorous acid)	-	-
+5	HClO3 (Chloric acid)	HBrO3 (Bromic acid)	HIO3 (Iodic acid)
+7	HClO4 (Perchloric acid)	HBrO4 (Perbromic acid)	HIO4 (Periodic acid)