Statement : I The increase in molar conductance with dilution is more in HCl than in HCOOH

Statement : II On dilution the degree of dissociation of strong electrolyte increases  while that of weak electrolyte decreases

 Molar conductance of strong electrolytes increases due to 

(1) Strong electrolytes are almost completely dissociated in moderate concentrations.

(2) number of ions in the total volume of the solution containing one mole of electrolyte remains same

(3) velocity of conducting ions increases

Molar conductance of weak electrolytes increases due to 

(1) increase in degree of dissociation of weak electrolyte

(2) increase in number of ions in the total volume of the solution containing one mole of electrolyte.

on dilution increase in molar conductivity of weak electrolyte is greater than increase in molar conductivity of strong electrolytes