Question

Which of the following statement(s) is not true for van't-Hoff factor (i)?

• A. $\text{Van't Hoff factor (i) > 1 (for dissociation)}$
• B. $\text{Van't Hoff factor (i) < 1 (for association)}$
• C. $\text{Van't Hoff factor (i) = 1 (for non -dissociation)}$
• D. $\text{Van't Hoff factor (i) = 0 (for non -dissociation)}$

Answer 1

The correct option is D $\text{Van't Hoff factor (i) = 0 (for non -dissociation)}$

The actual extent ​of dissociation/​association can ​be expressed with ​a correction factor known as van’t Hoff factor (i).​
$i=\frac{\text{No. of moles after association/dissociation}}{\text{No. of moles before association/dissociation}}$
​For electrolytic solute undergoing association :
$i<1$
For electrolytic solute undergoing dissociation :
$i>1$
For non-electrolytic solute (no association/dissociation):
$i=1$