Q.1
For a dilute solution, Roult's law states that .. [ IIT 1985]
  • a) The lowering of vapour pressure is equal to mole fraction of the solute
  • b) The relative lowering of vapour pressure is equal to the mole fraction of the solute
  • c) The relative lowering of vapour pressure is equal to the amount of the solute in the solution.
  • 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]
  • a) Boiling point
  • b) Vapour pressure
  • c) Osmotic pressure
  • d) Freezing point
Q.3
Which of the following statement is correct? .... [ Pb.CET 1986]
  • a) Lowering of vapour pressure takes place only in ideal solution
  • b) Lowering of vapour pressure does not depend upon the solvent at a given concentration of the solute
  • c) Lowering of vapour pressure depends upon the nature of the solute
  • 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]
  • a) Camphor
  • b) Napthalene
  • c) Benzene
  • d) Water
Q.5
mixture which shows positive deviation from Raoult’s law is .... [NEET 2020]
  • a) Acetone + Chloroform
  • b) Chloroethane + Bromoethane
  • c) Ethanol + Acetone
  • 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]
  • a) 0.40 K
  • b) 0.60 K
  • c) 0.20 K
  • d) 0.80 K
Q.7
The mixture that forms maximum boiling azeotrope is: [NEET 2019]
  • a) Water + Nitric acid
  • b) Ethanol + Water
  • c) Acetone + Carbon disulphide
  • 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]
  • a) Strength gm/gm
  • b) It shows molar concentration
  • c) Molal concentration
  • 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]
  • a) 0.0256
  • b) 0.1056
  • c)0.1288
  • 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]
  • a) 31.43%
  • b) 5.56%
  • c)6.78%
  • d)6.96%
Q.11
Which of the following mode of expressing concentration is independent of temperature? [ IIT 1988]
  • a) Molarity
  • b) Molality
  • c) Formality
  • 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:
  • a)1
  • b)2
  • c)3
  • 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]
  • a) )45
  • b) 90
  • c) 180
  • d) 360
Q.14
The semi-permeable membrane allows the passage of [AFMC 1998]
  • a)Solvent particle
  • b)Solute particle
  • c)Solution
  • d)All of these
Q.15
Tyndall effect can be observed in [AFMC 1999]
  • a) colloidal solution
  • b) solvent
  • c)soluted
  • 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]
  • a)0.5 gm
  • b)1 gm
  • c)1.5 gm
  • d)2 gm
Q.17
Isotonic solutions have [AFMC 1999]
  • a) same vapour pressure
  • b) same osmotic pressure
  • c) same freezing point
  • d) same temperature
Q.18
Which is the colligative property? [AFMC 2000]
  • a)Surface tension
  • b)Osmotic pressure
  • c)Viscosity
  • d)Refractive index
Q.19
Normality of 0.3 M H3 PO4 solution is [AFMC 2000]
  • a) 0.3N
  • b) 0.4N
  • c)0.6N
  • d)0.9N
Q.20
The solutions which have same osmotic concentrations are known as [AFMC 2001]
  • a) Normal
  • b) Isotonic
  • c)Hypotonic
  • d)Hypertonic
Q.21
Molality does not change with [AFMC 2001]
  • a) Temperature
  • b) Concentration
  • c) Pressure
  • d) All of these
Q.22
4 gm caustic soda is dissolved in 100 cc of solution. The normality of solution is [AFMC 2001]
  • a)0
  • b)0.5
  • c)1
  • d)1.5
Q.23
10 gm of glucose is dissolved in 150 gm. of water.The mass percentage of glucose is [AFMC 2001]
  • a) 2.50%
  • b) 6.25%
  • c)8.75%
  • 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]
  • a)0.0267
  • b)0.2670
  • c)1.0267
  • d)1.1670
Q.25
Buffer solutions can be obtained by mixing aqueous solution of [AFMC 2002, 2004]
  • a) NaOH and HCl
  • b) CH3COOH and NaOH
  • c) CH3COONa and CH3COOH
  • d) CH3COONa and HCl
Q.26
Brownian movement is found in [AFMC 2002]
  • a)unsaturated solution
  • b) saturated solution
  • c)colloidal solution
  • 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]
  • a)0.4N
  • b) 0.899N
  • c)0.04N
  • d)0.08N
Q.28
The term used for diffusion of solvent through a semi-permeable membrane is known as: [AFMC 2003]
  • a) osmosis
  • b) plasmolysis
  • c)diffusion
  • d)active absorption
Q.29
Distribution law was given by [AFMC 2003]
  • a) Ostwald
  • b) van't Hoff
  • c) Nernst
  • d) Henry
Q.30
he molar concentration of 20g of NaOH present in 5 litre of solution is [AIIMS 1998]
  • a)0.1moles/litre
  • b)0.2moles/litre
  • c)1 moles/litre
  • d)2 moles/litre
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