Phenol associates in benzene to certain extent to form dimer. A solution containing 2.0 x10-2 kg of phenol in 1.0 kg of benzene has its freezing point decreased by 0.69K. Calculate the degree of association of phenol (Kf for benzene = 5.12 K kg mol)
a) 0.82
b) 0.64
c) 0.73
d) 0.98
