NTA Abhyas JEE Main2020Chemistrys Block ElementsPractice
Among alkali metal salts, the lithium salts are the poorest conductors of electricity in aqueous solution because of
Options
- Aeasy diffusion of L i + ions
- Blower ability of L i + ions to polarize water molecules
- Clowest charge to radius ratio
- Dhigher degree of hydration of L i + ions
Correct answer
D. higher degree of hydration of L i + ions
Step-by-step solution
Ionic conductance in solution depends upon the mobility of ions, which depend upon the degree (or extent) of hydration. Since charge/radius ratio is maximum for L i + , so it is hydrated to a maximum extent. Thus, the ionic size in aqueous solution, instead of increasing, actually decreases on moving from L i + to C s + .