• # question_answer Which one of the following is the true covalent oxide of iodine [MP PET/PMT 1988] A) ${{I}_{2}}{{O}_{4}}$ B) ${{I}_{2}}{{O}_{5}}$ C) ${{I}_{2}}{{O}_{7}}$ D) ${{I}_{2}}{{O}_{9}}$

In general, higher the oxidation state, more is the covalent character of the oxide. ${{I}_{2}}{{O}_{7}}$&${{I}_{2}}{{O}_{5}}$ do not exist. ${{I}_{2}}{{O}_{4}}$ is ionic in nature. It is infact iodyl iodate  ${{[IO]}^{+}}{{[I{{O}_{3}}]}^{-}}$. The only covalent oxide is ${{I}_{2}}{{O}_{5}}$.