Question

LiF is least soluble among the fluorides of alkali metals, because

• A. Smaller size Li⁺ impart significant covalent character in LiF
• B. The hydration energies of Li⁺ and F^– are quite higher
• C. Lattice energy of LiF is quite higher due to the smaller size of Li⁺ and F^–
• D. LiF have strong polymeric network in solid

Answer 1

Answer: (C)

Lattice energy of LiF is quite higher due to the smaller size of Li⁺ and F^–

Answer 2

The small size of both Li⁺ and F^– ion leads to a very high value of lattice energy and thus crystal of LiF is very difficult to break