Account for the following :
a) Moist `SO_(2)` decolourises `KMnO_(4)` solution.
b) In general interhalogen compounds are more reactive than halogens (except fluorine).
c) Ozone acts as a powerful oxidizing agent

Explanation

(a) Moist sulphur dioxide behaves as a reducing agent, reduces `MnO_(4)^(-) to Mn^(2+)` X - X ' bond in interhalogens is weaker than X - X bond in halogensexcept F -
(b) F bond.
(c) Due to the ease with which it liberates atoms of nascent oxygen.