Chemistry - CHEMICAL BONDING Question with Solution | TestHub

The statement in option D is incorrect. In $T\ell I_3$, the thallium (T$\ell$) is in the +1 oxidation state, and the compound is an ionic compound $T{\ell }^{+}[I_3{]}^{-}$. The triiodide ion ($I_3^{-}$) has an average oxidation state of -1/3 for each iodine atom, but the T$\ell$ is +1.