Question

An aqueous solution of the following concentration of Acetic acid is the best conductor.

• A. 10${}^1$M
• B. 10${}^{-3}$M
• C. 10${}^{-1}$M
• D. 10${}^2$M

Answer 1

The correct option is B 10${}^{-3}$M

for weak electrolytes
${\lambda }_m=\frac{K}{C}$
$\therefore {\lambda }_m\alpha \frac{1}{C}$
$\therefore$ The one with lowest concentration has highest molar conductance.

Hence, option B is correct.