Question

Given below are two statements : one is labelled as Assertion $A$ and the other is labelled as Reason R.
Assertion $A$ : LiF is sparingly soluble in water.
Reason $R$ : The ionic radius of $Li ^{+}$ion is smallest among its group members, hence has least hydration enthalpy.
In the light of the above statements, choose the most appropriate answer from the options given below .

• A. Both A and R are true and R is the correct explanation of A
• B. Both A and R are true but R is NOT the correct explanation of A
• C. A is true but R is false
• D. A is false but R is true

Answer 1

Answer: (C)

Due to high lattice energy $LiF$ is sparingly soluble in water. $Li ^{+}$has high hydration energy among its group members due to smallest size.