Arrange the following :
(i) Increasing order of thermal stability HOCl, HClO2, HClO3, HClO4.
(ii) Increasing acid strength HClO, HClO2, HClO3, HClO4.
(iii) Increasing oxidising power HClO, HClO2, HClO3, HClO4.
(iv) Increasing reducing nature F–, Cl –, Br –, I –.
(v) Increasing oxidation number of iodine I2, HI, HIO4, ICl.