Question

7.
Among LiF, CaF, and MgS the increasing order of lattice
energy (only value without sign) is
(A) MgS > CaF, > LiF (B) LiF > MgS > CaF,
(C) CaF, > LiF > MgS (D) LiF > MgF, > CaS​

Answer 1

Answer:

b) LiF > MgS > CaF

Explanation:

In the alkaline earth metals, down the group, Hydration energy increases and lattice energy decreases.

Hence the order. Remember the periodic table always!