Ncert Exercises & Solutions

Van't Hoff factor (i) is given by the expression

a. $i = \frac{Normal molar mass}{abnormal molar mass.}$

b. $i = \frac{Abnormal molar mass}{normal molar mass.}$

c. $i = \frac{Observed colligative property}{calculated colligative property.}$

d. $i = \frac{Calculated colligative property}{observed colligative property.}$

The correct choice among the given is-

1. (a, b)

2. (b, c)

3. (c, d)

4. (a, c)

Hint: Van't Hoff factor (i)

i = \frac{normal molar mass}{abnormal molar mass}

van't Hoff factor (i) is a measure of the extent of association or dissociation of solute particles which can be calculated as follows:

normal molar mass / abnormal molar mass