Question

The van't Hoff factor i for a compound which undergoes dissociation in one solvent and association in other solvent is respectively

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

Answer 1

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

Van't Hoff factor $\left(i\right)$: It is a correction factor by which actual extent of association/ dissociation can be expressed.

$i=\frac{\text{No. of moles after association/dissociation}}{\text{No. of moles before association/dissociation}}$

For electrolytic solute undergoing association :
$i<1$
For electrolytic solute undergoing dissociation :
$i>1$
For non-electrolytic solute:
$i=1$