Question

The increase in the molar conductivity of $HCl$ with dilution is due to:

• A. increase in the self ionization of water
• B. hydrolysis of $HCl$
• C. decrease in the self ionization of water
• D. decrease in the interionic forces

Answer 1

Answer: (D)

decrease in the interionic forces

For strong electrolytes, $\lambda m={\lambda }_o-K\sqrt{C}$

$\therefore$ As solution is diluted, its concentration decreases and molar conductivity increases. This is because oppositely charged ions become further apart and hence, interionic force decreases and ions can move more freely.

Hence, option $D$ is correct.