AIIMS 2016 Chemistry Question Paper for free online practice with solutions

The freezing point of a solution containing 0.2 g of acetic acid in 20.0 g benzene is lowered by 0.45℃. The degree of association of acetic acid in benzene is (Assume acetic acid dimerises in benzene and Kf for benzene = 5.12 K kg mol−1 ) Mobserved of acetic acid = 113.78