Phenol associates in Benzene to a certain extent to form dimer. A solution containing $\text{2.0}\times 10^{-2}\text{ kg}$ of Phenol in $1.0\text{kg}$ of benzene has its freezing point decreased by $0.69\text{K}\text{.}$ The percentage degree of association of Phenol is $\left({\text{K}}_{\text{f}}\right.$ for benzene $\left.=5.12\text{K}{\text{kg mol}}^{-1}\right)$