The metal that is not extracted from its sulfide ore is :
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: $$\mathrm{LiF}$$ is sparingly soluble in water.
Reason R: The ionic radius of $$\mathrm{Li}^{+}$$ 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.
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion : Boric acid is a weak acid.
Reason R : Boric acid is not able to release $$\mathrm{H}^{+}$$ ion on its own. It receives $$\mathrm{OH}^{-}$$ ion from water and releases $$\mathrm{H}^{+}$$ ion.
In the light of the above statements, choose the most appropriate answer from the options given below.