Molecules of benzoic acid (C6H5COOH) dimerise in benzene. ‘w’ g of the acid dissolved in 30g of benzene shows a depression in freezing point equal to 2K. If the percentage association of the acid to form dimer in the solution is 80, then w is (Given that kf = 5 K kg mol-1, molar mass of benzoic acid = 122 g mol-1

Molecules of benzoic acid (C6H5COOH) dimerise in benzene. ‘w’ g

1.	Molecules of benzoic acid (C6H5COOH) dimerise in benzene. ‘w’ g of the acid dissolved in 30g of benzene shows a depression in freezing point equal to 2K. If the percentage association of the acid to form dimer in the solution is 80, then w is (Given that kf = 5 K kg mol-1, molar mass of benzoic acid = 122 g mol-1
A.	1.8 g
B.	1.0 g
C.	2.4 g
D.	1.5 g
Answer» D. 1.5 g