Question

When the solute-solute interaction of electrolytic solution increase,

• A. the resistance will decrease
• B. the resistance will remain constant
• C. the conductance will increase
• D. the conductance will decrease

Answer 1

The correct option is D the conductance will decrease

Factor affecting electrolytic conductance/resistance:
(a) Solute- Solute interaction:
When inter–ionic force of attraction​ between solute is higher, the resistance will be higher. Thus, lower will be the conductance.
$\text{Attractive force}\propto \text{Charge of ions}$

At higher concentration, ​the force of attraction ​between the ions increases which decreases the ​speed of the ions​. Hence, conductance decreases with increase in concentration​.