6.Acetic acid exists as dimers in benzene, if on dissolving 1.65 gm of acetic acid in 100 gm of benzene the Vant Hoff factor i comes out to be 0.508 then extent of association of acetic acid in benzene is

7.The vapour pressure of pure benzene at 298 K is 97.0 mm Hg. The vapour pressure of solution containing 10.0 gm of napthalene (mol. wt. 128) in 100 gm of benzene at 398 K will be

8.Raoults law for solutions containing non-volatile solute is concerned with lowering of

9.A colligative property depends upon

10.An aqueous solution containing 6 g of urea in 500 ml of solution has a density equal to 1.052. If the molecular mass of urea is 60, then the molality of solution is