Chemistry - Solutions and Surface Chemistry
Exam Duration: 60 Mins Total Questions : 30
Azeotropic mixtures are
- (a)
mixture of two solids
- (b)
those which boil at different temperatures
- (c)
those which can be fractionally distilled
- (d)
constant boiling mixture
If glycerol and methanol were sold at the same price in market, which would be cheaper for preparing an anti-freeze solution for the radiator of an automobile?
- (a)
Glycerol
- (b)
Methanol
- (c)
Both are equal
- (d)
None of these
Colloidal solution commonly used in the treatment of eye disease is
- (a)
colloidal silver
- (b)
colloidal gold
- (c)
colloidal antimony
- (d)
colloidal sulphur
An emulsion is a colloid of a
- (a)
gas in a liquid
- (b)
liquid in a liquid
- (c)
liquid in a gas
- (d)
gas in a solid
Which of the following properties are characteristic of lyophobic sols?
1. Low viscosity
2. High viscosity
3. Reversibility
4. Coagulation by electrolytes at low concentrations
Select the correct answer using the code given below.
- (a)
1, 3 and 4
- (b)
2 and 3 only
- (c)
1 and 4 only
- (d)
1 and 3 only
Match the Column I with Column II.
Column I | Column II |
A. Molarity (M) | 1. is the concentration unit for ionic compounds which dissolve in a polar solvent to give pair of ions. |
B. Molality (m) | 2. is number of gram equivalents of substance dissolve per litre of the solution |
C. Formality (F) | 3. is the number of moles of the solute dissolved in 1000 of the solvent |
D. Normality (N) | 4. is the number of moles of solute present in 1 of the solution |
- (a)
A B C D 3 1 2 4 - (b)
A B C D 1 2 4 3 - (c)
A B C D 2 4 3 1 - (d)
A B C D 4 3 1 2
Match the Column I (Colloidal dispersion) with Column II (Nature of the dispersion) and select the correct answer using the codes given below the columns.
Column I | Column 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. Liquids in solid |
- (a)
A B C D 4 2 1 5 - (b)
A B C D 1 5 3 2 - (c)
A B C D 4 5 1 2 - (d)
A B C D 1 2 3 5
Match the Column I with the Column II.
Column I | Column II |
A. Rain cloud | 1. Sol |
B. Milk of magnesia | 2. Foam |
C. Whipped cream | 3. Micelles |
D. Soap in water | 4. Aerosol |
- (a)
A B C D 4 1 2 3 - (b)
A B C D 1 2 3 4 - (c)
A B C D 2 3 4 1 - (d)
A B C D 3 4 1 2
Match the Column I with the Column II.
Column I | Column II |
A. Tyndall effect | 1. Dispersion of finely divided droplets in another liquid |
B. Brown movement | 2. Flocculation and settling down of the discharged sol particles. |
C. Coagulation | 3. Zig-zag movement executed by a colloidal particle in the dispersion medium. |
D. Emulsion | 4. Scattering of light by the particles. |
- (a)
A B C D 1 4 3 2 - (b)
A B C D 4 3 2 1 - (c)
A B C D 3 4 2 1 - (d)
A B C D 2 1 4 3
The solubility of a gas in liquid increases with
- (a)
increase in temperature
- (b)
reduction in gas pressure
- (c)
Decrease in temperature and increase in gas pressure
- (d)
amount of liquid taken
Match the Column I with the Column II.
Column I | Column II |
A. Dialysis | 1. Precipitate converts to colloidal solution |
B. Peptization | 2. Precipitation of colloidal solution |
C. Flocculation | 3. Protect power |
D. Gold number | 4. Purification of colloidal solution |
- (a)
A B C D 2 3 4 1 - (b)
A B C D 1 2 3 4 - (c)
A B C D 4 1 2 3 - (d)
A B C D 3 4 1 2
Soaps cannot be used in acidic condition because of they lose their cleansing effect due to formation of insoluble
- (a)
esters
- (b)
alcohols
- (c)
hydrocarbons
- (d)
long-chain fatty acids
An ideal solution is formed when its components
1. can be converted into gases
2. obey Raoult's law
3. have no change of volume
4. have zero heat of mixing
Which of the above statement(s) is/are correct?
- (a)
Only 1
- (b)
2, 3 and 4
- (c)
Only 2
- (d)
3 and 4 only
Match the Column I with Column II.
Column I | Column II |
A. Cod liver | 1. Liquid in a gas |
B. Vanishing | 2. Solid dispersed in gas |
C. Fog | 3. Aqueous emulsion |
D. Smoke | 4. Water in oil emulation |
- (a)
A B C D 1 2 4 3 - (b)
A B C D 3 1 2 4 - (c)
A B C D 4 3 1 2 - (d)
A B C D 2 4 3 1
When blood cells are placed in a solution of KCL whose osmotic pressure is greater than that of the cell fluid, there occurs
- (a)
shrinking in size of the cell
- (b)
increase in size of the cell
- (c)
no change in size
- (d)
first shrinking and then regaining of original size
Assertion (A) In osmosis, solvent molecules pass through a semi-permeable membrane from a more dilute solution to a more concentrated one, when the two are separated by the semi-permeable membrane.
Reason (R) The vapour pressure of the over the dilute solution is less than that over the concentrated solution.
- (a)
Both A and R are individually true and R is the correct explanation of A
- (b)
Both A and R are individually true, but R is not the correct explanation of A
- (c)
A is true, but R is false
- (d)
A is false, but R is true
Assertion (A) Surface tension is zero at critical temperature.
Reason (R) At critical temperature surface disappears.
- (a)
Both A and R are individually true and R is the correct explanation of A
- (b)
Both A and R are individually true, but R is not the correct explanation of A
- (c)
A is true, but R is false
- (d)
A is false, but R is true
The solution of rubber is an example of
- (a)
lyophobic colloid
- (b)
multimolecular colloid
- (c)
associated colloid
- (d)
macromolecular colloid
Consider the following statements
1. Azeotropic mixtures are constant temperature boiling mixture.
2. Azeotropic mixtures are those which boils at different temperatures.
3. Azeotropic mixture of two solids
Which of the above is/are true?
- (a)
Only 1
- (b)
Only 2
- (c)
Only 3
- (d)
1, 2 and 3
When oil floats on water, the surface tension of water
- (a)
vanishes immediately
- (b)
decreases considerably
- (c)
increases considerably
- (d)
remains unaffected
Surface tension of a liquid decreases with
1. increase in temperature of the liquid.
2. mixing of detergent in the liquid.
3. decrease in temperature.
Which of the statement(s) given above is/are correct?
- (a)
2 and 3
- (b)
1 and 2
- (c)
Only 2
- (d)
Only 1
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
A hard shell of an egg was dissolved in HCL. The egg was then placed in a concentration solution of NaCl. What will happen?
- (a)
The egg will shrink
- (b)
The egg will swell
- (c)
The egg will become harder
- (d)
There will be hardly any visible change
Blood has been found isotonic with
- (a)
saturated solution of NaCl
- (b)
saturated solution of KCL
- (c)
saturated solution of 1:1 mixture of NaCl and KCl
- (d)
normal sodium chloride solution
Match the Column I with Column II.
Column I | Column II |
A. Lyophilic | 1. Movement of colloidal particle under the influence of electric field |
B. Dialysis | 2. Formation of colloid from suspension |
C. Peptization | 3. Separating a crystalloid from a colloid filtration |
D. Electrophoresis | 4. Solvent loving colloids |
- (a)
A B C D 4 3 2 1 - (b)
A B C D 3 2 1 4 - (c)
A B C D 2 1 4 3 - (d)
A B C D 1 4 3 2
The process of separating of cream from milk is called
- (a)
electro-osmosis
- (b)
emulsion
- (c)
emulsification
- (d)
demulsification
Blood cells do not shrink in blood because blood is
- (a)
isotonic
- (b)
hypertonic
- (c)
hypotonic
- (d)
equimolar
Muddy water is purified by adding alum due to
- (a)
osmosis
- (b)
emulsification
- (c)
coagulation
- (d)
dialysis
Consider the statements.
1. During the pressure of osmosis, the solvent 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)
2 Only
- (c)
Both 1 and 2
- (d)
Neither 1 nor 2
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 solution to a solution causes an increase in its water potential
- (c)
The vapour pressure of the water in a solution is lower that of pure water
- (d)
When a solution is separated from water by a semi-permeable membrane water movement