Question

Which of the following is the correct statement for the molecule, $Cs{I}_3$?

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

Answer 1

Answer: (B)

It contains $C{s}^{+}$ and $I_3^{-}$

$C_S{I}_3$ (Ionic compound)

Since Group $I\left(A\right)$ alkali metal can only show one valency or $+1$ oxidation state, it can only exists as $C{s}^{+}{I}_3^{-}$