The conductivity of electrolytic (ionic) solution depends on
(A). Nature of electrolyte added
(B). Nature of solvent
(C). Temperature
(D). Size of ions produced
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A), (B), (C) and (D)
An electrolytic solution conducts because its ions move towards the electrodes. Its conductivity therefore depends on how many ions there are and how fast they move.
(A) Nature of electrolyte added — Correct. A strong electrolyte such as KCl is fully ionised and conducts well; a weak one such as acetic acid gives few ions. The charge of the ions also matters.
(B) Nature of solvent — Correct. A polar solvent helps the electrolyte to ionise, and a more viscous solvent slows the ions down.
(C) Temperature — Correct. On heating, the viscosity of the solvent falls and the ions move faster, so the conductivity increases.
(D) Size of ions produced — Correct. The size of an ion, together with its layer of solvent molecules (solvation), decides how easily it moves; a larger solvated ion moves more slowly.
NCERT (2026-27 edition):
Conductance of Electrolytic Solutions – …
