Which of the following factors affect the electrolytic conductance of a solution?
A. Nature of electrode
B. Nature of solvent
C. Number of valence electrons
D. Concentration of electrolyte
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → B and D only
In an electrolytic (ionic) conductor, current is carried by the movement of ions through the solution. So its conductance depends on whatever changes the number of ions or how freely they move.
A. Nature of electrode — Incorrect. Inert electrodes only lead the current into and out of the solution. The conductance measured is a property of the solution, not of the electrode material.
B. Nature of solvent — Correct. A solvent with a high dielectric constant separates the ions better, and a less viscous solvent lets them move faster.
C. Number of valence electrons — Incorrect. This decides electronic (metallic) conductance, where electrons carry the current. In a solution the charge is carried by ions.
D. Concentration of electrolyte — Correct. Conductivity decreases on dilution because there are fewer ions per unit volume, while molar conductivity increases.
NCERT (2026-27 edition):
Conductance of Electrolytic Solutions – …
