The variation of molar conductivity with concentration of an electrolyte (X) in aqueous solution is shown in the given figure.
The electrolyte X is :

The final major product of the following reaction is :

The major product of the following reaction is :

Lattice enthalpy and enthalpy of solution of NaCl are 788 kJ mol^–1, and 4 kJ mol^–1, respectively.
The hydration enthalpy of NaCl is :