Q. By diluting a weak electrolyte , specific conductivity $(K_{c})$ and equivalent conductivity $(\lambda_{c})$ change as
A) Both increase
B) $K_{c}$ increases , $\lambda_{c}$ decreases
C) $K_{c}$ decreases , $\lambda_{c}$ increases
D) Both decrease
Explanation
(c)
When the solution of a weak electrolyte is diluted, the volume of the solution increases, hence equivalent conductivity $(\lambda_{c})$ increases. However, during this process, the number of current carrying particles per ${cm}^{2\ }$decreases, hence specific conductivity $(K_{c})$ decreases.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.