Which of the following represents a metastable system?
1. an unsaturated solution
2. a dilute solution
3. a saturated solution
4. a supersaturated solution
When a non-volatile solute is dissolved in a solvent. The relative lowering of vapor pressure is equal to
(1) Molar fraction of solute
(2) Molar fraction of solvent
(3) Concentration of the solute in grams per liter
(4) Concentration of the solute in gram per 100 mL.
Van't Hoff factor is
(1) More than one in case of association
(2) Less than one in case of dissociation
(3) Equal to
(4) Equal to
The solubility of a gas in a liquid increase with
(1) Increase of temperature
(2) Amount of liquid taken
(3) Decrease in temperature
(4) Reduction of gas pressure
Which of the following solution would exhibit abnormal colligative properties?
(1) 1 M glucose
(2) 0.1 M NaCl
(3) 0.1 M sucrose
(4) 10 gram glass powder in water
The number of moles of sodium hydroxide present in 2.5 L and 0.5 M aqueous solution will be
(1) 1.25
(2) 0.5
(3) 12.5
(4) 5
Maximum freezing point will be for 1 molal solution of assuming equal ionization in each case:
(1) [Fe(HO)]Cl
(2) [Fe(HO)Cl] Cl.HO
(3) [Fe(HO)Cl]Cl.2HO
(4) [Fe(HO)Cl].3HO
The solution which has the lowest freezing point is
(1) 0.1 M potassium nitrate
(2) 0.1 M aluminium sulphate
(3) 0.1 M potassium chloride
(4) 0.1 M potassium sulphate
The vant Hoff factor 'i' accounts for
1. the extent of dissociation of solute
2. the extent of dissolution of solute
3. the degree of decomposition of solution
4. degree of solubilization of solute
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