Q. The correct order of molar conductivity at infinite dilution of $LiCl,\ NaCl\ and\ KCl$ is
A) $LiCl > KCl > \ NaCl$
B) $KCl > NaCl > LiCl$
C) $LiCl > NaCl > KCl$
D) $NaCl > KCl > LiCl$
Explanation
(b)
Ionic mobility depends upon the charge to size ratio of ion. The ionic size in case of hydrated cation is
$K^{+}(aq) < {Na}^{+}(aq) < \ {Li}^{+}(aq)$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.