Q.1.
For a dilute solution, Roult's law states that .. [ IIT 1985]
-
17%
a) The lowering of vapour pressure is equal to mole fraction of the solute
-
49%
b) The relative lowering of vapour pressure is equal to the mole fraction of the solute
-
10%
c) The relative lowering of vapour pressure is equal to the amount of the solute in the solution.
-
23%
d) The vapour pressure of the solution is equal to mole fraction of the solvent.
Q.2.
Which of the following is colligative property .. [ AFMC 1992]
-
11%
a) Boiling point
-
15%
b) Vapour pressure
-
69%
c) Osmotic pressure
-
5%
d) Freezing point
Q.3.
Which of the following statement is correct? .... [ Pb.CET 1986]
-
12%
a) Lowering of vapour pressure takes place only in ideal solution
-
17%
b) Lowering of vapour pressure does not depend upon the solvent at a given concentration of the solute
-
28%
c) Lowering of vapour pressure depends upon the nature of the solute
-
43%
d) relative lowering of vapour pressure does not depend upon the solvent at a given concentration of the solute
Q.4.
Maximum freezing point falls isn ... [ MP PMT 1986]
-
30%
a) Camphor
-
27%
b) Napthalene
-
17%
c) Benzene
-
26%
d) Water
Q.5.
mixture which shows positive deviation from Raoult’s law is .... [NEET 2020]
-
24%
a) Acetone + Chloroform
-
15%
b) Chloroethane + Bromoethane
-
39%
c) Ethanol + Acetone
-
21%
d) Benzene + Toluene
Q.6.
The freezing point depression constant (Kf) of benzene is 5.12 K kg mol-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) : [NEET 2020]
-
45%
a) 0.40 K
-
33%
b) 0.60 K
-
17%
c) 0.20 K
-
5%
d) 0.80 K
Q.7.
The mixture that forms maximum boiling azeotrope is: [NEET 2019]
-
49%
a) Water + Nitric acid
-
23%
b) Ethanol + Water
-
15%
c) Acetone + Carbon disulphide
-
12%
d) Heptane + Octane
Q.8.
One mole of a substance is present in 1 kg of solvent. The correct statement regarding above solution is [AFMC 1998]
-
8%
a) Strength gm/gm
-
47%
b) It shows molar concentration
-
32%
c) Molal concentration
-
13%
d) Normality
Q.9.
5 gm of CH3COOH is dissolved in one litre of ethanol. Suppose there is no reaction between them. If the density of ethanol is 0.789 gm/ml then the molality of resulting solution is [AFMC 1998]
-
28%
a) 0.0256
-
45%
b) 0.1056
-
20%
c)0.1288
-
7%
d)0.1476
Q.10.
When 800 gm of a 40% solution by weight was cooled, 100 gm of solute precipitated. The percentage composition of remaining solutionis [AFMC 1998]
-
38%
a) 31.43%
-
33%
b) 5.56%
-
23%
c)6.78%
-
6%
d)6.96%
Q.11.
Which of the following mode of expressing concentration is independent of temperature? [ IIT 1988]
-
27%
a) Molarity
-
59%
b) Molality
-
8%
c) Formality
-
6%
d) Normality
Q.12.
0.45 g of acid of molecular weight 90 was neutralized by 20 ml. of a 0.5N caustic soda. The basicity of an acid is [AFMC 1998] Solution:
-
25%
a)1
-
44%
b)2
-
23%
c)3
-
8%
d)4
Q.13.
The freezing point of a 3% aq. solution of A is equal to the freezing point of 9% aq. solution of B. If the molecular weight of 'A' is 60, then the Molecular wt. of B is [AFMC 1998]
-
10%
a) )45
-
27%
b) 90
-
59%
c) 180
-
5%
d) 360
Explanation
Q.14.
The semi-permeable membrane allows the passage of [AFMC 1998]
-
64%
a)Solvent particle
-
11%
b)Solute particle
-
11%
c)Solution
-
15%
d)All of these
Q.15.
Tyndall effect can be observed in [AFMC 1999]
-
72%
a) colloidal solution
-
9%
b) solvent
-
2%
c)soluted
-
17%
d)precipitate
Q.16.
The amount of dibasic acid present in 100 ml of the aq. solution to give solution of normality of 0.1 N is….[mol. wt.=200] [AFMC 1999]
-
24%
a)0.5 gm
-
39%
b)1 gm
-
24%
c)1.5 gm
-
13%
d)2 gm
Q.17.
Isotonic solutions have [AFMC 1999]
-
12%
a) same vapour pressure
-
77%
b) same osmotic pressure
-
6%
c) same freezing point
-
4%
d) same temperature
Q.18.
Which is the colligative property? [AFMC 2000]
-
7%
a)Surface tension
-
91%
b)Osmotic pressure
-
0%
c)Viscosity
-
2%
d)Refractive index
Q.19.
Normality of 0.3 M H3 PO4 solution is [AFMC 2000]
-
15%
a) 0.3N
-
26%
b) 0.4N
-
21%
c)0.6N
-
38%
d)0.9N
Q.20.
The solutions which have same osmotic concentrations are known as [AFMC 2001]
-
4%
a) Normal
-
87%
b) Isotonic
-
0%
c)Hypotonic
-
9%
d)Hypertonic
Q.21.
Molality does not change with [AFMC 2001]
-
63%
a) Temperature
-
14%
b) Concentration
-
7%
c) Pressure
-
16%
d) All of these
Explanation
Q.22.
4 gm caustic soda is dissolved in 100 cc of solution. The normality of solution is [AFMC 2001]
-
19%
a)0
-
25%
b)0.5
-
47%
c)1
-
9%
d)1.5
Q.23.
10 gm of glucose is dissolved in 150 gm. of water.The mass percentage of glucose is [AFMC 2001]
-
14%
a) 2.50%
-
62%
b) 6.25%
-
11%
c)8.75%
-
14%
d)10%
Q.24.
The molarity of mixture obtained by mixing 100 ml of 0.4 M H2SO4 and 200 ml of 0.2M HCl is ..[AFMC 2002]
-
12%
a)0.0267
-
53%
b)0.2670
-
26%
c)1.0267
-
9%
d)1.1670
Q.25.
Buffer solutions can be obtained by mixing aqueous solution of [AFMC 2002, 2004]
-
31%
a) NaOH and HCl
-
19%
b) CH3COOH and NaOH
-
28%
c) CH3COONa and CH3COOH
-
22%
d) CH3COONa and HCl
Q.26.
Brownian movement is found in [AFMC 2002]
-
4%
a)unsaturated solution
-
21%
b) saturated solution
-
50%
c)colloidal solution
-
25%
d)suspension solution
Q.27.
A solution is formed by diluting 250 ml. of 0.40 N H2SO4 with one litre of water. The normality of above formed solution is : [AFMC 2003]
-
16%
a)0.4N
-
31%
b) 0.899N
-
34%
c)0.04N
-
19%
d)0.08N
Q.28.
The term used for diffusion of solvent through a semi-permeable membrane is known as: [AFMC 2003]
-
70%
a) osmosis
-
8%
b) plasmolysis
-
18%
c)diffusion
-
5%
d)active absorption
Q.29.
Distribution law was given by [AFMC 2003]
-
32%
a) Ostwald
-
37%
b) van't Hoff
-
13%
c) Nernst
-
18%
d) Henry
Q.30.
he molar concentration of 20g of NaOH present in 5 litre of solution is [AIIMS 1998]
-
46%
a)0.1moles/litre
-
20%
b)0.2moles/litre
-
23%
c)1 moles/litre
-
11%
d)2 moles/litre