||Jai Sri Gurudev|| Sri Adichunchanagiri Shikshana Trust®
VISHWAMANAVA COMPOSITE P U COLLEGE
Kommerahalli, Mandya
CHEMISTRY- NEET/JEE/CET
SOLUTIONS
1. Which of the following is dependent on temperature?
(a) Molarity (b) Mole fraction (c) Weight percentage (d)Molarity
2. When pressure is increased at constant temperature
(a) rate of Haber’ process decreases
(b) solubility of gas in liquid increases
(c) solubility of solid in liquid increases
(d) 2C(s) + CO2(g) 2CO(g) reaction moves in the forward direction.
3. Solubility of gas in liquid increases with
(a) increase of P and decrease of T (b) decrease of P and decrease of T
(c) increase of P and increase of T (d) decrease of P and increase of T [KCET-2022]
4. 5.5 mg of nitrogen gas dissolves in 180 g of water at 273 K and one atm pressure due to nitrogen gas. The
mole fraction of nitrogen in 180 g of water at 5 atm nitrogen pressure is approximately
(a) 1 x 10-6 (b) 1 x 10-5 (c) 1 x 10-3 (d) 1 x 10-4 [KCET-2014]
5. Henry’s law constant for the solubility of N2 gas in water at 298 K is 1.0 x 10 atm. The mole fraction of N2
5
in air is 0.8. The number of moles of N2 from air dissolved in 10 moles of water at 298 K and 5 atm pressure
(a) 4.0 x 10-4 (b) 4.0 x 10-5 (c) 5.0 x 10-4 (d) 4.0 x 10-6 [KCET-2021]
6. Choose the correct statement
(a) KH value is same for gas in any solution (b) Higher the KH value more the solubility of gas
(c) KH value increases on increasing the temperature of the solution
(d) Easily liquefiable gases usually have lesser KH values. [KCET-2021]
7. Henry’s law constants for aqueous solution of CO, O 2, CO2 and C2H2 gases at 25°C are respectively as
58×103, 43×103, 1.61×103 and 1.34 × 103. The solubility of these gases decreases in the order
(a) CO > O2 > CO2 > C2H2 (b) O2 > CO2 > CO > C2H2
(c) C2H2 > CO2 > O2 > CO (d) O2 > CO2 > C2H2 > CO
8. Addition of a non-volatile solute in a volatile ideal solvent
(a) increases the vapor pressure of the solvent (b) decreases the vapors pressure of the solvent
(c) decreases the boiling point of the solvent (d) increases the freezing point of the solvent
9. The vapor pressure of pure liquids A & B are 450 & 700 mm of Hg at 350 K respectively. If the total vapor
pressure of the mixture is 600 mm Hg, the composition of the mixture in the solution is [KCET-2021]
(a) xA = 0.4, xB = 0.6 (b) xA = 0.6, xB = 0.4 (c) xA = 0.3, xB = 0.7 (d) xA = 0.7, xB = 0.3
10. Vapor solution of solution containing 18 g of glucose and 178.2 g of water at 1000C is (vapor pressure of
pure water at 1000C = 760 torr)
(a) 76.0 torr (b) 752.4 torr (c) 7.6 torr (d) 3207.6 torr [KCET-2024]
11. Vapor pressure of pure ‘A’ is 70 mm of Hg at 25oC. It forms an ideal solution with ‘B’ in which mole
fraction of ‘A’ is 0.8. If the vapor pressure of the solution is 84 mm of Hg at 25oC, the vapor pressure of B
at 25oC is
(a) 56 mm (b) 70 mm (c) 140 mm (d) 28 mm [KCET-2009]
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12. Which one of the following binary liquid mixtures exhibits negative deviation
from Raoult’s law?
(a) n-Hexane-n-Heptane (b) Chloroform-Acetone
(c) Carbon disulphide –Acetone (d) Bromoethane – Chloroethene (e) Benzene-Toluene
13. A mixture of phenol and aniline shows negative deviation from Roult’s law. This is due to the formation of
(a) polar covalent bond (b) non polar covalent bond
(c) Intermolecular hydrogen bonding (d) Intramolecular hydrogen bonding [KCET-2024]
14. Which of the following statements is correct regarding a solution of two components A and B exhibiting
positive deviation from ideal behavior?
(a) Intermolecular attractive force between A-A and B-B is stronger than A-B
(b) Δmix H = 0 at constant T and P (c) ΔmixV = 0 at constant T and P
(d) Intermolecular attractive forces between A-A and B-B are equal to those between A-B.
15. Which of the following is an example of maximum boiling azeotrope?
(a) 2% KCl solution in water (b) 90% ethanol + 10% water
(c) 68% HNO3 + 32% water (d) None of the above
16. A solution of two liquids boils at temperature more than the boiling point of either of them. Hence, the
binary solution shows
(a) negative deviation from Roult’s law (b) positive deviation from Roult’s law
(c) no deviation from Roult’s law
(d) positive or negative deviation from Roult’s law depending upon the composition [KCET-2011]
17. The vapor pressure of two liquids A and B in their pure states are in ratio of 1:2. A binary solution of A and
B contains A and B in the mole proportion of 1:2. The mole fraction of A in the vapor phase of the solution
will be
(a) 0.33 (b) 0.2 (c) 0.25 (d) 0.52 [KCET-2012]
18. Which of the following is not a colligative property?
(a) Elevation on boiling point (b) Osmotic pressure
(c) Refractive index (d) Lowering of vapor pressure
19. For dilute solutions, Raoult’s law states that
(a) Lowering of vapor pressure is equal to the mole fraction of the solute
(b) Relative lowering of vapor pressure is equal to the mole fraction of the solvent
(c) Relative lowering of vapor pressure of the solvent is equal to the mole fraction of the solute
(d) Vapor pressure of the solution is equal to the vapor pressure of the solvent.
20. 3 g of urea is dissolved in 45 g of water. The relative lowering of vapor pressure is
(a) 0.05 (b) 0.04 (c) 0.02 (d) 0.01 [KCET-2013]
21. The relative lowering of vapor pressure of a dilute solution of glucose dissolved in 1 Kg of water is 0.002.
The molality of the solution is
(a) 0.004 (b) 0.222 (c) 0.111 (d) 0.021 [KCET-2019]
22. The vapor pressure of pure liquid solvent is 0.8 atm when a non- volatile substance B is added to the solvent
its vapor pressure drops to 0.6 atm. What is mole fraction of component B in this solution?
(a) 0.75 (b) 0.25 (c) 0.48 (d) 0.3
23. Vapor pressure of water at 293 k is 17.535 mm Hg. The vapor pressure of water at 293 K containing 25 g
of glucose dissolved in 450 g of water is
(a) 17.44 mm Hg (b) 17.34 mm Hg c) 0.097 mm Hg (d) 34.97 mm Hg
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24. The unit of ebullioscopic constant is
(a) K kg mol-1 or K (molality)-1 (b) Mol kg K-1 or K -1(molality)
(c) Kg mol-1 K-1 or K-1 (molality)-1 (d) K mol kg-1 or K (molality)
25. If molality of the dilute solution is doubled, the value of molal depression constant (K f) will be
(a) halved (b) tripled (c) unchanged (d) doubled
o
26. At 100 C the vapor pressure of a solution of 6.5 g of a solute in 100 g water is 732 mm. If K b = 0.52, the
boiling point of this solution will be
(a) 102oC (b) 103oC (c) 101oC (d) 1000C
27. Boiling point of benzene is 353.23 K. When 1.8 g of non-volatile solute is dissolved in 90 g of benzene,
then boiling point is raised to 354.11 K. Given Kb(benzene) = 2.53 K kg mol-1. The molecular mass of non-
volatile substance is
(a) 58 g mol-1 (b) 120 g mol-1 (c) 116 g mol-1 (d) 60 g mol-1
28. The rise in boiling point of a solution containing 1.8 g of glucose in 100 g of solvent is 0.1oC. The molal
elevation constant of the liquid is
(a) 2 K kg mol-1 (b) 10 K kg mol-1 (c) 0.1 K kg mol-1 (d) 1 K kg mol-1 [KCET-2022]
29. Ethylene glycol is added to water as an anti-freeze. It will
(a) Decrease the freezing point of water in winter and increase the boiling point of water in summer
(b) Only decrease the freezing point of water
(c) Only increase the boiling point of water
(d) Be used for cleaning the radiator in the car
30. After adding non-volatile solute freezing point of water decreases to -0.186oC. Calculate ΔTb if Kf = 1.86 K
kg mol-1 and Kb = 0.521 K kg mol-1
(a) 0.0521 K (b) 0.0186 K (c) 0.521 K (d) 1.86 K [KCET-2015]
31. 45 g of ethylene glycol (C2H6O2) is mixed with 600 g of water, what is the depression of freezing point?
(a) 7.9K (b) 2.5K (c)6.6K (d) 2.2K
32. A sample of water is found to contain 5.85 % (w/w) of AB (molecular mass 58.5) & 9.50 % (w/w) XY 2
(molecular mass 95). Assuming 80 % ionization of AB and 60 % ionization of XY 2, the freezing point of
water sample is [Given Kf = 1.86 K kg mol-1, freezing point of water is 273 K and A, B & Y are monovalent
ions]
(a) 280.44 K (b) 281.75 K (c) 264.25 K (d) 265.56 K [KCET-2023]
33. When the pure solvent diffuses out of the solution through the semipermeable membrane then the process is
(a) sorption (b) dialysis (c) osmosis (d) reverse osmosis [KCET-2017]
34. Isotonic solutions are having the same
(a) surface tension (b) vapor pressure (c) osmotic pressure (d) viscosity [KCET-2018]
35. A 6% solution of urea is isotonic with
(a) 0.05 M solution glucose (b) 6% solution glucose
(c) 25% solution glucose (d) 1 M solution glucose [KCET-2009]
36. A 0.06% (w/v) solution of urea is isotonic with
(a) 0.6% solution glucose (b) 0.1 M solution glucose
(c) 0.066% solution glucose (d) 0.01 M solution glucose [KCET-2015]
37. Which of the pair is isotonic
(a) 0.001 M Al2(SO4)3 and 0.01 M BaCl2 (b) 0.001 M Al2(SO4)3 and 0.001 M CaCl2
(c) 0.001 M CaCl2and 0.01 M BaCl2 (d) 0.015 M NaCl and 0.01 M BaCl2 [KCET-2020]
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38. If 3 g of glucose (molar mass = 180 g) is dissolved in 60 g of water at 15oC, the osmotic pressure of the
solution will be
(a) 6.57 atm (b) 5.57 atm (c) 0.34 atm (d) 0.65 atm [KCET-2022]
39. The empirical formula of non-electrolyte is CH2O. A solution containing 6 g of the compound exerts the
same osmotic pressure as that of 0.05 M glucose solution at the same temperature. The molecular formula of
the compound is
(a) C2H4O2 (b) C3H6O3 (c) C5H10O5 (d) C4H8O4 [KCET-2010]
40. 0.1 M NaCl and 0.05 M BaCl2 solutions are separated by a semipermeable membrane in a container. For
this system, choose the correct answer.
(a) There is no movement of any solution across the membrane.
(b) Water flows from BaCl2 solution towards NaCl solution
(c) Water flows from Nacl solution towards BaCl2 solution
(d) Osmotic pressure of 0.1 M NaCl is lower than that of BaCl2 (assume complete dissociation)
41. Desalination of sea water can be done by
(a) Osmosis (b) reverse osmosis (c) Filtration (d) diffusion
42. What happens when blood cells are placed in pure water?
(a) The fluid in blood cells rapidly moves into water
(b) The water molecules rapidly move into blood cells.
(c) The blood cells dissolve in water. (d) No change takes
43. When an electrolyte is dissociated in solution, the van’t Hoff factor (i) is
(a) >1 (b) < 1 (c) 0 (d) =1 [KCET-2016]
44. The depression in freezing point of 0.1 M aqueous solutions of HCl, CuSO4 and K2SO4 are in the ratio
(a) 1:1:1.5 (b) 1:2:3 (c) 1:1:1 (d) 2:4:3
45. Which of the following aqueous solution has the highest boiling point?
(a) 1.0 M NaOH (b) 1.0 M Na2SO4 (c) 1.0 M NH2NO3 (d) 1.0 M KNO3 [KCET-2018]
46. Which of the following aqueous solution has the highest freezing point?
(a) 0.1 molal Al2(SO4)3 (b) 0.1 molal BaCl2 (c) 0.1 molal AlCl3 (d) 0.1 molal NH4Cl [KCET-2017]
47. Which of the following aqueous solution has the highest freezing point?
(a) 0.01 M NaCl (b) 0.01 M Na2SO4 (c) 0.1 M sucrose (d) 0.1 M NaCl [KCET-2015]
o
48. A solution of 1.25 g of P in 50 g of water lowers freezing point by 0.3 C. Molar mass of P is 94. Kf(water) =
1.86 K kg mol-1. The degree of association of P in water is
(a) 80 % (b) 60 % (c) 65 % (d) 75 % [KCET-2014]
49. A non-volatile solute ‘A’ tetramerises in water to the extent of 80%, 2.5 g of ‘A’ in 100 g of water lowers
the freezing point by 0.3oC. The molar mass of ‘A’ in mol L-1 is (Kf(water) = 1.86 K kg mol-1)
(a) 62 (b) 221 (c) 155 (d) 354 [KCET-2019]
50. Solute ‘X’ dimerises in water to the extent of 80%, 2.5 g of ‘X’ in 100 g of water increases the boiling point
by 0.3oC. The molar mass of ‘X’ is (Kf(water) = 0.52 K kg mol-1)
(a) 52 (b) 65 (c) 26 (d) 13 [KCET-2020]
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