The solution of sodium metal in liquid ammonia is strongly reducing due to the presence of which of the following in the solution?

What is the primary purpose of the Dow's process?

Which among the following elements is used in devising photoelectric cells?

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 it has the least hydration enthalpy.
In the light of the above statements,choose the most appropriate answer from the options given below.

Which one of the following fluorides of alkali metals has the highest lattice energy?

The blue color of a solution of sodium in liquid ammonia is due to the presence of.....