Question

The correct statement for the molecule $Cs{I}_3$ is that:

• A. it contains $C{s}^{3+}$ and $I^{-}$ ions
• B. it contains $C{s}^{+},I^{-}$ and lattice $I_2$ molecule
• C. it is a covalent molecule
• D. it contains $C{s}^{+}$ and $I_3{}^{-}$ ions

Answer 1

The correct option is D it contains $C{s}^{+}$ and $I_3{}^{-}$ ions

$Cs{I}_3\to C{s}^{+}+{I_3}^{-}$

$\Rightarrow Cs$ cannot show $+3$ oxidation state.

$\Rightarrow I_2$ molecules are too large to be accommodated in the lattice.

Hence, the correct option is $D$