During osmosis, flow of water through a semi permeable membrane is
From solution having higher concentration only
From both sides of semi-permeable membrane with equal flow rates
From both sides of semi-permeable membrane with unequal flow rates
From solution having lower concentration only
Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has a density of 1.80 g mL-1. Volume of acid required to make one litre of 0.1 M H2SO4 solution is
11.10 mL
16.65 ml
22.20 mL
5.55 mL
Which one of the following salts will have the same value of van't Hoff factor (i) as that of K4[Fe(CN)6]?
Al2(SO4)3
NaCl
Al(NO3)3
Na2SO4
The lowering of vapour pressure of the solvent takes place on dissolving a non-volatile solute because
the surface tension of the solution decreases
the density of the solution increases
the molecules of the solvent on the surface are replaced by the molecules of the solute
the viscosity of the solution increases
Molarity of liquid HCl, if density of solution is 1.17 g/cc is
36.5
18.25
32.05
42.10
A solution of acetone in ethanol
Shows a negative deviation from Raoult's law
Shows a positive deviation from Raoult's law
is near an ideal solution
Obeys Raoult's law
Pure water can be obtained from sea water by
Centrifugation
Plasmolysis
Reverse osmosis
Sedimentation
The vapour pressure, at a given temperature, of an ideal solution containing 0.2 mole of a non volatile solute and 0.8 mole of solvent is 60 mm of Hg. The vapour pressure of the pure solvent at the same temperature is
150 mm of Hg
60 mm of Hg
75 mm of Hg
120 mm of Hg
Acetic acid is dissolved in benzene, and the molecular mass is determined from the elevation of boiling point. The molecular mass obtained will be ........ (Assume complete dimerisation of acetic acid in benzene)
60
120
180
30
The van't Hoff factor for an aqueous solution of Al2(SO4)3 is
3
5
9
4