A solution which contains the maximum amount of the solute that can be dissolved in a given amount of solvent at a particular temperature is called
A. saturated solution
B. unsaturated solution
C. supersaturated solution
D. none of the above
Select an option to see the answer and solution.
Azeotropic mixtures are
A. mixture of two solids
B. those which boil at different temperatures
C. those which can be fractionally distilled
D. the constant boiling mixture
Select an option to see the answer and solution.
The process of diffusion in gases take place due to the
A. difference in their densities
B. difference in their composition
C. equal in densities
D. All of the above
Select an option to see the answer and solution.
The process of separating of cream from milk is called
A. electro-osmosis
B. emulsion
C. emulsification
D. demulsification
Select an option to see the answer and solution.
Which one of the following statements is not correct?
A. The boiling point of an aqueous solution is highter than that of pure water
B. Addition of solutes to a solution causes an increase in its water potential
C. The vapour pressure of the water in a solution is lower than that of pure water
D. When a solution is separated from water by a semi-permeable membrane water starts movement
Select an option to see the answer and solution.
Cloud is a colloidal dispersion of
A. air in a dispersion medium of water
B. fog in a dispersion mediumof water
C. mist in a dispersion medium of air
D. water drops in a dispersion medium of air
Select an option to see the answer and solution.
Which one of the following colloidal systems is represented by soda water?
A. Liquid in gas
B. Gas in liquid
C. Solid in gas
D. Liquid in liquid
Select an option to see the answer and solution.
Which one of the following is the best example of desiccant?
A. Silica gel
B. Polystyrene
C. Sodium chloride
D. Sodium carbonate
Select an option to see the answer and solution.
Which one of the following is not the result of surface tension?
A. Vapour formation above the liquid surface
B. Convex shape of liquid meniscus
C. Liquid rising in a capillary
D. Spherical shape of mercury fallen on the floor
Select an option to see the answer and solution.
When oil floats on water, the surface tension of water
A. vanishes immediately
B. decreases considerably
C. increases considerably
D. remains unaffected
Select an option to see the answer and solution.
Muddy water is purified by adding alum due to
A. osmosis
B. emulsification
C. coagulation
D. dialysis
Select an option to see the answer and solution.
Blood has been found isotonic with
A. the saturated solution of NaCl
B. the saturated solution of KCl
C. the saturated solution of 1 : 1 mixture of NaCl and KCl
D. the normal sodium chloride solution
Select an option to see the answer and solution.
. . . . . . . . is one of the most important technique for the separation of a mixture by passing it in solution or suspension through a medium in which the components move at different rates.
A. Filtration
B. Distillation
C. Evaporation
D. Chromatography
Select an option to see the answer and solution.
If an unsaturated sugar solution is prepared by mixing 100 grams of sugar with half litre of water, which of the following physical quantities will not change?
A. Mass
B. Density
C. Concentration
D. Volume
Select an option to see the answer and solution.
Which of the following methods helps in separating cream from milk?
A. Distillation
B. Centrifugation
C. Chromatography
D. Sublimation
Select an option to see the answer and solution.
Consider the following statements.
1. During the pressure of osmosis, the solvent travels from the concentrated solution to the dilute solution.
2. In the reverse osmosis, external pressure is applied to the dilute solution.
Which of the statement(s) given above is/are correct?
A. Only 1
B. Only 2
C. Both 1 and 2
D. Neither 1 nor 2
Select an option to see the answer and solution.
Colloidal medicines are more effective because
A. the germs move towards them
B. they are cheap
C. they are easily assimilated and absorbed
D. they are easy to prepare
Select an option to see the answer and solution.
Match
List-I (Colloidal Dispersion) with
List-II (Nature of the Dispersion) and select the correct answer:
List-I
List-II
a. Milk
1. Solid in liquid
b. Clouds
2. Liquid in gas
c. Paints
3. Solids in solids
d. Jellies
4. Liquids in liquids
5. Liquid in Solid
A. a-4, b-2, c-1, d-5
B. a-1, b-5, c-3, d-2
C. a-4, b-5, c-1, d-2
D. a-1, b-2, c-3, d-5
Select an option to see the answer and solution.
Which one of the following substances is not a mixture?
A. Tin
B. Sea water
C. Soil
D. Air
Select an option to see the answer and solution.
Soaps clean surface on the principle is based on
A. viscosity
B. floatation
C. elasticity
D. surface tension
Select an option to see the answer and solution.