One molal solution of a carboxylic acid in benzene shows the elevation of boiling point of 1.518 K. The degree of association for dimerisation of the acid in benzene is 

(Kb for benzene = 2.53 K kgmol^-1)

(1) 60%

(2) 70%

(3) 75%

(4) 80 %

The relationship between osmotic pressure at 273 K, when 10 gm glucose (P₁), 10 gm urea (P₂), and 10 gm sucrose (P₃) are dissolved in 250 ml of water, is-

1. P₁ > P₂ > P₃

2. P₃ > P₁ > P₂

3. P₂ > P₁ > P₃

4. P₂ > P₃ > P₁

If 'A' contains 2 % NaCl and is separated by a semi permeable membrane from 'B', which contains 10 % NaCl, then the event that will occur is

1. NaCl will flow from 'A' to 'B'

2. NaCl will flow from 'B' to 'A'

3. Water will flow from 'A' to 'B'

4. Water will flow from 'B' to 'A'

The vapour pressure of water depends upon:

(1) surface area of container

(2) volume of container

(3) Temperature

(4) All of these

The boiling point of an azeotropic mixture of water and ethanol is less than that of water and ethanol. The mixture shows

(1) No deviation from Raoult's law

(2) Positive deviation from Raoult's law

(3) Negative deviation from Raoult's law

(4) That the solution is unsaturated

A 5.85% solution of NaCl has osmotic pressure close to-

1. 5.85% solution of urea

2. 2M solution of glucose

3. 1M solution of urea

4. 5.8% solution of glucose

The mole(s) of K₂SO₄ to be dissolved in 12 moles of water to lower its vapor pressure by 10 mm of Hg at a temperature at which vapor pressure of pure water is 50 mm of Hg is :

The salt that possesses the highest freezing point

1. 0.01 M NaCl

2. 0.05 M Urea

3. 0.01 M MgCl₂

4. 0.02 M NaCl

Aluminium phosphate is 100 % ionized in 0.01 m aqueous solution. Hence, $∆{\mathrm{T}}_{\mathrm{b}}/{\mathrm{k}}_{\mathrm{b}}$ is-

Which solution has highest freezing point?

1. 1% glucose solution

2. 1% urea solution

3. 1% sucrose solution

4. All have same freezing