AP EAMCET Engineering 22 Sep 2020 Shift 2 Paper

Reducing properties increase from fluorine to iodine, so it is oxidised by nitric acid.
12+10HNO3⟶2HIO3+10NO2+4H2O
Nitric acid oxidises iodine to iodic acid, HIO3 and not periodic acid HIO4, which is of a higher oxidation state.