Question

By diluting a weak electrolyte, specific conductivity $K_c$ and equivalent conductivity $\left({\lambda }_c\right)$ change as-

• A. Both increase
• B. ${\text{K}}_{\text{c}}$ increases, ${\lambda }_c$ decreases
• C. ${\text{K}}_{\text{c}}$ decreases, ${\lambda }_c$ increases
• D. Both decrease

Answer 1

Answer: (C)

When the solution of a weak electrolyte is diluted, the volume of the solution and degree of dissociation of electrolyte increases, hence equivalent conductivity $\left({\lambda }_c\right)$ increases. However, during this process, the number of current carrying particles per unit volume decreases, hence specific conductivity $\left(K_c\right)$ decreases.