(i) On dilution $\wedge_m$ of $\mathrm{CH}_3\mathrm{COOH}$ increases very fast because it is a weak electrolyte and the number of ions also increases due to increase in the degree of dissociation (less than 1). However,in $\mathrm{CH}_3\mathrm{COONa}$ which is a strong electrolyte, the number of ions remains same but the intermolecular forces of attraction decreases and the degree of dissociation is equal to 1 . Thus, $\wedge_m$ increases gradually in case of $\mathrm{CH}_3\mathrm{COONa}$.(ii) If the external potential applied become greater than $E^{\circ}$ cell of electrochemical cell, then the reaction gets reversed and the electrochemical cell acts as an electrolytic cell and vice-versa.