The aqueous solution of sugar does not conduct electricity. However, when sodium chloride is … it affected by concentration of sodium…
(i) Sugar being a non-electrolyte does not ionize in water, whereas NaCl ionizes completely in water and produces Na+ and Cl– ions which help in the conduction of electricity.
(ii) When concentration of NaCl is increased, more Na+ and Cl ions will be produced. Hence, conductance increases.