One mole of a solute Ais dissolved in a given volume of a solvent. The association of the solute takes place as follows:
`n A Leftrightarrow A_n
If `alpha` is the degree of association of A the van't Hoff factor i is expressed as:

Options

A. `i=I -alpha`
B. `i=I + (alpha)/(n)`
C. `i=(I-alpha + (alpha)/(n))/(1)`
D. `i=1`

Answer

C

Explanation

`i= (C(1- alpha ) + (C alpha)/(n))/(C )rArr i= 1 -alpha + (alpha)/(n)`