Question

The Van't Hoff factors $i$ for an electrolyte which undergoes dissociation and association in solvents are respectively:

• A. greater than one and less than one
• B. less than one and greater than one
• C. less than one and less than one
• D. greater than one and greater than one

Answer 1

The correct option is A greater than one and less than one

In case of association of solute particles in solution, the observed molecular weight of solute being more than the normal, the value of factor 'i' is less than unity (i.e. i < 1), while for dissociation the value of i is greater than unity (i.e. i > 1), because the observed molecular weight has lesser value than normal molecular weight.

Hence, the correct option is $A$