At the same temperature which of the following solutions will be isotonic? [ MP PMT 1985]
42%
a) 3.42g of sucrose per litre of water and 0.18g glucose per litre of water
25%
b) 3.42g of sucrose per litre and 0.18g glucose in 0.1 litre of water
25%
c) 3.42g of sucrose per litre of water and 0.585g of sodium chloride per litre of water
8%
d) 3.42g of sucrose per litre of water and 1.17g of sodium chloride per litre of water
Q.2.
The molal elevation constant is the ratio of the elevation in B.P. to ... [ CPMT 1982]
0%
a) Molarity
38%
b) Molality
38%
c) Mole fraction of solute
23%
d) Mole fraction of solvent
Q.3.
A molal solution is one that contains one mole of a solute in .. [ IIT 1986]
36%
a) 1000g of solvent
18%
b) one litre of solvent
27%
c) one litre of the solution
18%
d) 22.4 litre of the solution
Q.4.
At constant temperature, the osmotic pressure of a solution is ... [ CPMT 1986]
67%
a) directly proportional to the concentration
25%
b) inversely proportional to the concentration
8%
c) directly proportional to the square of the concentration
0%
d) directly proportional to the square root of the concentration
Q.5.
Van't Hoff factor more than unity indicates that the solute in solution has ... [ DEC 1994]
42%
a) dissociated
25%
b) associated
17%
c) both
17%
d) can not say anything
Q.6.
Vapour pressure of solution is ... [ EAMCET 1988]
38%
a) directly proportional to the mole fraction of the solvent.
25%
b) inversely proportional to mole fractional of the solute
12%
c) inversely proportional to the mole fraction of the solvent
25%
d) directly proportional to the mole fraction of solute
Q.7.
The solubility f gas increases in a liquid with .. [ Pb. CET 1990]
44%
a) increase of temperature
22%
b) reduction of gas pressure
33%
c) decrease in temperature
0%
d) amount of liquid taken
Q.8.
A non-volatile electrolyte dissolved in an aqueous solution in the same molal proportion as a non electrolyte gives .. [ Pb CET 1991]
0%
a) the same colligative effect
36%
b) higher colligative effect
36%
c) lower colligative effect
27%
d) no colligative effect
Q.9.
At low concentration, the statement that equimolal solution under a given set of experimental conditions have equal osmotic pressure is true for .. [ BHU 1979]
22%
a) All solutions
44%
b) Solutions of non-electrolytes only
33%
c) Solutions of electrolytes only
0%
d) None of these
Q.10.
When mercuric iodide is added to the aqueous solution of potassium iodide, the ... [ IIT 1987]
40%
a) freezing point is raised
20%
b) freezing point is lowered
30%
c) freezing point does not change
10%
d) boiling point does not change
Q.11.
Which of the following is a colligative property? [ BHU 1990]
25%
a) surface tension
0%
b) viscosity
62%
c) osmotic pressure
12%
d) boiling point
Q.12.
Which of the following would exert maximum osmotic pressure? [ NCERT 1982]
33%
a) Decinormal aluminium sulphate
0%
b) Decinormal barium chloride
33%
c) Decinormal sodium chloride
33%
d) A solution obtained by mixing equal volumes of (b) and (c) and filtering
Q.13.
The boiling point of an azeotropic mixture of water and ethanol is less than that of water and ethanol. The mixture shows... [ IIT 1981]
36%
a) negative deviation from Raoult's law
55%
b) positive deviations from Raoult's law
0%
c) no deviations from Raoul's law
9%
d) deviations which cannot be predicted from given information.
Q.14.
Blood cells retains their normal shape in solution which are ... [ DPMT 1984]
0%
a) hypotonic to blood
70%
b) isotonic to blood
20%
c) hypertonic to blood
10%
d) equinormal to blood
Q.15.
Which inorganic precipitate acts as a semipermeable membrane? [ MP PMT 1993]
25%
a) Calcium phosphate
12%
b) Nickel phosphate
38%
c) Calcium sulphate
25%
d) Copper ferrocyanide
Q.16.
The best and accurate method for determining osmotic pressure is ... [ JIPMER 91]
14%
a) Negative pressure method
57%
b) Berkeley and Hartley method
14%
c)
14%
d)
Q.17.
An ideal solution is formed when its components... [ DPMT 1994]
0%
a) have no volume change on mixing
14%
b) have no enthalpy change on mixing
86%
c) have both the above characteristics
0%
d) have high solubility
Q.18.
In cold countries, ethylene glycol is added to water in the radiators of cars during winters. This results in ... [ AFMC 1994]
29%
a) lowering of freezing point
0%
b) reducing the viscosity
43%
c) reducing the specific heat
29%
d) making water a better conductor of electricity
Q.19.
Which of the following aqueous solution has minimum freezing point? [ CBSE PMT 1991]
33%
a) 0.01 m NaCl
33%
b) 0.005 m C2H5OH
17%
c) 0.005 m MgI2
17%
d) 0.005 m MgSO4
Q.20.
If 0.1M solution of glucose and 0.1M solution of urea are placed on two sides of the semipermeable membrane to equal heights, then it will be correct to say that ....[ CBSE PMT1992]
25%
a) there will be no net movement across the membrane
25%
b) glucose will flow towards urea solution
25%
c) urea will flow towards glucose solution
25%
d) water will flow from urea solution to glucose solution
Q.21.
Azeotropes are .. [ NCERT 1980]
14%
a) liquid mixture which distil unchanged in composition
43%
b) liquid which can mix with each other in all proportions
29%
c) solids which form solid solutions of definite composition
14%
d) gas which can be separated
Q.22.
Molecular weight of sodium chloride determined by osmotic pressure method will be .. [ Haryana CEET 1992]
0%
a) equal to 58.5
14%
b) greater than 58.5
29%
c) less than 58.5
57%
d) none of the above as this method can not be used for molecular weight determination
Q.23.
A 0.6% solution of urea ( molecular weight=60) would be isotonic with.. [ NCERT 1982]
17%
a) 0.1M glucose
33%
b) 0.1 M KCl
17%
c) 0.6% glucose solution
33%
d) 0.6% KCl solution
Q.24.
semipermiable membrane is that which permits the passage of ... [ MP PET 1994]
0%
a) Solute molecules only
50%
b) Solvent molecules only
17%
c) Solute and Solvent molecules both
33%
d) Neither solute nor solvent molecules
Q.25.
The freezing point of 1 molal NaCl solution assuming NaCl to be 100% dissociated in water is .. [ CPMT 1985] kf=1.8g
12%
a) - 1.86°C
25%
b) - 3.72°C
38%
c) + 1.86°C
25%
d) + 3.72°C
Q.26.
The osmotic pressure of a solution increases if... [ AFMC 1993]
0%
a) temperature is decreased
33%
b) solution constant is increased
50%
c) number of solute particles is increased
17%
d) volume is increased
Q.27.
All form ideal solution except .. [ CBSE PMT 1988]
33%
a) C6H6 and C6H5Br
33%
b) C2H5Br and C2H5I
17%
c) C6H5Cl and C6H5Br
17%
d) C2H5I and C2H5OH
Q.28.
Sugar is soluble in water due to .. [ Pb CET 1989]
17%
a) High solvation energy
0%
b) Ionic character of sugar
17%
c) High dipole moment of water
67%
d) Hydrogen bond formation with water
Q.29.
Acetic acid dissolved in benzene shows a molecular mass of .. [ MP PMT 1993]
17%
a) 30
17%
b) 60
33%
c) 120
33%
d) 180
Q.30.
Which of the following liquid pairs shows a positive deviation from Raoult's law
17%
a) Water-hydrochloric acid
0%
b) Water nitric acid
33%
c) Acetone chloroform
50%
d) Benzene-methanol
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