Assertion (A) : LiF is sparingly soluble in water.\ Reason (R) : The ionic radius of $Li^+$ ion is

Question

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.

Professor PC Thomas Classes · Answer

LiF is insoluble due to extreme lattice energy. However, $Li^+$ has the HIGHEST hydration enthalpy, so the Reason is factually false.