If in solvent, n simple molecules of solute combine to form an associated molecule `X` is degree of association the Van't Hoff's factor 'I' is equal to:

Options

A. `(1)/(1-nx)`
B. `(1-x-nx)/(1)`
C. `(1-x+(x)/(n))/(1)`
D. `((x)/(n)-1+x)/(1)`

Answer

C

Explanation

`nA rarr An`
`1 -x (x)/(n)`
`i = (1-x+(x)/(n))/(1)`