Question

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

• A. It contains $C{s}^{\oplus }$ and $I^{\ominus }$ ions
• B. It contains $C{s}^{\oplus }$ and $I^{\ominus }$ and lattice $I_2$ molecule
• C. It is a covalent molecule
• D. It contains $C{s}^{\oplus }$ and $I_3^{\ominus }$ ions

Answer 1

The correct option is D It contains $C{s}^{\oplus }$ and $I_3^{\ominus }$ ions

$Cs{I}_3\to C{s}^{\oplus }+I_3^{\ominus }$
i. Cs cannot show +3 oxidation state.
ii. $I_2$ molecules are too large to be accommodated in lattice.