Which of the following statements are correct?

(A) On dilution, conductivity of all the electrolytes decreases.
(B) On dilution, the number of ions per unit volume decreases.
(C) Molar conductivity increases with dilution.
(D) Limiting molar conductivity is the conductivity at a very high concentration.

Choose the correct answer from the options given below.

(A), (B) and (C) only

The correct answer is Option (1) → (A), (B) and (C) only

Let’s analyze each statement carefully:

(A) On dilution, conductivity of all the electrolytes decreases. ✅

• True, because conductivity (κ) depends on number of ions per unit volume, which decreases on dilution.

(B) On dilution, the number of ions per unit volume decreases. ✅

• True, this is the reason for decrease in conductivity.

(C) Molar conductivity increases with dilution. ✅

• True, because molar conductivity $\Lambda_m = \kappa \cdot \frac{1000}{C}$​ increases as κ decreases less rapidly than 1/C, especially for weak electrolytes.

(D) Limiting molar conductivity is the conductivity at a very high concentration. ❌

• False. Limiting molar conductivity $\Lambda_m^0$​ is at infinite dilution, not high concentration.