1.

Statement-1: Lithium is the most powerful reducing agent and sodium is the least powerful reducing agent amongst the alkali metals in aqueous solutions. Statement-2:Lithium has the highest hydration enthalpy and the sodium the least value.

Answer»

Statement-1 is True, Statement-2 is True, Statement-2 is a correct EXPLANATION for Statement-1
Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1
Statement-1 is True, Statement-2 is False.
Statement-1 is False, Statement-2 is True.

Solution :(i)`E^0Li^(+)//Li= - 3.04 , Na^(+)//Na=-2.71` which is least among the alkali metals.
(ii)Hydration enthalpy /`KJ mol^(-1)`
Li= -506 , Na=-406 , CS has the least `DeltaH_(hyd)=-276`


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