Question

Which compound is highest covalent?

• A. LiCI
• B. LiF
• C. LiBr
• D. Lil

Answer 1

Answer: (D)

The magnitude of polarised or increased covalent character depends upon a number of factors. These factors are
1. Small size of cation : Smallest size of cation greater is its covalent character.
2. Large size of anion : Larger the size of anion greater is its covalent character.
3. Large charge on either of the two ions : As the charge on the ion increases, the covalent character increases.
Hence,
In $Lil$, due to larger size $I^{-},LiI$ is more covalent.