Q. Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field ?
A) Na
B) K
C) Rb
D) Li
Explanation
[Solution] $Li^+$ is the most heavily hydrated, so its hydrated ion is largest and least mobile. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.