First slide
Group-17 or Halogen family
Question

Which of the following trend correctly represents the stability of oxides of halogens.

Moderate
Solution

In oxides of halogen, the bond polarity, however, increases as we move from F to I. The stability of oxides of iodine is greater than those of chlorine. Iodine-oxygen bond is stable due to greater polarity of the bond while the stability of the chlorine-oxygen bond is due to multiple bond formation involving d-orbitals of the chlorine atom. Bromine being in between lacks both these characteristics. Thus, the stability of oxides of halogens decreases in the order : I > Cl > Br > F.

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