The azeotropic mixture of water and ethanol boils at 78.15 ^oC. When this mixture is distilled, it is possible to obtain-

1. Pure H₂O

2. Pure C₂H₅OH

3. Pure H₂O as well as pure C₂HOH

4. Neither H₂O nor C₂H₅OH in their pure state 

Preservation of fruits against bacterial action by adding sugar is an example of-

1. Exosmosis

2. Reverse-osmosis

3. Diffusion

4. Capillary action

The freezing point of depression constant (K_f ) of benzene is 5.12 K kg mol^–1. The freezing point depression for the solution of molality 0.078 m containing a non-electrolyte solute in benzene is-
(rounded off upto two decimal places):
1. 0.80 K
2. 0.40 K
3. 0.60 K
4. 0.20 K

Colligative properties depend on:

A solution that has the highest boiling point among the following is -

1. 1.0 M NaOH

2. 1.0 M Na₂SO₄ 

3. 1.0 M NH₄NO₃

4. 1.0 M KNO₃

The unit of Ebullioscopic constant is:

1. K kg mol^-1 or K (molality)^-1

2. mol kg K^-1 or K^-1 (molality)

3. kg mol^-1 K^-1 or K^-1 (molality)^-1

4. K mol kg^-1 or K (molality)

In comparison to a 0.01 M solution of glucose, the depression in the freezing point of a 0.01 M MgCl₂ solution will be  -

Match the laws given in Column I with expressions given in Column II.

Codes

The boiling point of an azeotropic mixture of water and ethanol is less than that of water and ethanol individually. 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 pair of  isotonic solutions, among the following, is (assuming temperature to be the same) :

1. 0.1 (M) urea and 0.1 (M) NaCl

2. 0.1 (M) urea and 0.2 (M) MgCl₂

3. 0.1 (M) NaCl and 0.1 (M) Na₂SO₄

4. 0.1 (M) Ca(NO₃)₂ and 0.1 (M) Na₂SO₄