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Solutions

172 questions · Chemistry · JEE Main
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172 questions · Chemistry · JEE Main

  1. Which of the following graph correctly represents the plots of KH​ at 1 bar for gases in water versus temperature?2025 · 2 Apr · Shift 1 · Q15 · MCQ
  2. A solution is made by mixing one mole of volatile liquid A with 3 moles of volatile liquid B. The vapour pressure of pure A is 200 mm Hg and that of the solution is 500 mm Hg . The vapour pressure of pure B and the least volatile…2025 · 2 Apr · Shift 1 · Q7 · MCQ
  3. ' x' g of NaCl is added to water in a beaker with a lid. The temperature of the system is raised from 1∘C to 25∘C. Which out of the following plots, is best suited for the change in the molarity (M)…2025 · 2 Apr · Shift 2 · Q16 · MCQ
  4. When 1 g each of compounds AB and AB2​ are dissolved in 15 g of water separately, they increased the boiling point of water by 2.7 K and 1.5 K respectively. The atomic mass of A (in amu) is ​×10−1…2025 · 2 Apr · Shift 2 · Q22 · Numerical
  5. 2 moles each of ethylene glycol and glucose are dissolved in 500 g of water. The boiling point of the resulting solution is: (Given : Ebullioscopic constant of water =0.52 K kg mol−1 )2025 · 3 Apr · Shift 1 · Q10 · MCQ
  6. Which of the following properties will change when system containing solution 1 will become solution 2 ? Includes diagram2025 · 3 Apr · Shift 1 · Q11 · MCQ
  7. XY is the membrane/partition between two chambers 1 and 2 containing sugar solutions of concentration c1​ and c2​(c1​>c2​)molL−1. For the reverse osmosis to take place identify the correct… Includes diagram2025 · 4 Apr · Shift 1 · Q20 · MCQ
  8. Sea water, which can be considered as a 6 molar (6M) solution of NaCl , has a density of 2 g mL−1. The concentration of dissolved oxygen (O2​) in sea water is 5.8 ppm . Then the…2025 · 4 Apr · Shift 2 · Q21 · Numerical
  9. Given below are two statements: Statement (I) : Molal depression constant Kf​ is given by Δ Sfus​M1​RTf​​, where symbols have their usual meaning. Statement (II) : Kf​…2025 · 4 Apr · Shift 2 · Q7 · MCQ
  10. Liquid A and B form an ideal solution. The vapour pressures of pure liquids A and B are 350 and 750 mm Hg respectively at the same temperature. If xA​ and xB​ are the mole fraction of A and B in solution while yA​ and yB​ are the…2025 · 7 Apr · Shift 2 · Q12 · MCQ
  11. Match List - I with List - II. Choose the correct answer from the options given below : Includes table2025 · 7 Apr · Shift 2 · Q13 · MCQ
  12. Which of the following binary mixture does not show the behaviour of minimum boiling azeotropes?2025 · 8 Apr · Shift 2 · Q11 · MCQ
  13. HA(aq)⇌H+(aq)+A−(aq) The freezing point depression of a 0.1 m aqueous solution of a monobasic weak acid HA is 0.20 °C. The dissociation constant for the acid is Given:…2025 · 8 Apr · Shift 2 · Q6 · MCQ
  14. Arrange the following solutions in order of their increasing boiling points. (i) 10−4MNaCl(ii) 10−4M Urea (iii) 10−3MNaCl(iv) 10−2MNaCl2025 · 22 Jan · Shift 1 · Q15 · MCQ
  15. When a non-volatile solute is added to the solvent, the vapour pressure of the solvent decreases by 10 mm of Hg . The mole fraction of the solute in the solution is 0.2 . What would be the mole fraction of the solvent if decrease in vapour…2025 · 23 Jan · Shift 2 · Q2 · MCQ
  16. Consider a binary solution of two volatile liquid components 1 and 2.x1​ and y1​ are the mole fractions of component 1 in liquid and vapour phase, respectively. The slope and intercept of the linear plot of x1​1​ vs y1​1​…2025 · 23 Jan · Shift 2 · Q4 · MCQ
  17. Consider the given plots of vapour pressure (VP) vs temperature(T/K). Which amongst the following options is correct graphical representation showing ΔTf​, depression in the freezing point of a solvent in a…2025 · 24 Jan · Shift 1 · Q4 · MCQ
  18. What is the freezing point depression constant of a solvent, 50 g of which contain 1 g non volatile solute (molar mass 256 g mol−1 ) and the decrease in freezing point is 0.40 K ?2025 · 28 Jan · Shift 1 · Q2 · MCQ
  19. Assume a living cell with 0.9% (w/w) of glucose solution (aqueous). This cell is immersed in another solution having equal mole fraction of glucose and water. (Consider the data upto first decimal place only) The cell will :2025 · 28 Jan · Shift 2 · Q13 · MCQ
  20. 1.24 g of AX2​ (molar mass 124 g mol−1) is dissolved in 1 kg of water to form a solution with boiling point of 100.015°C, while 25.4 g of AY2​ (molar mass 250 g mol−1) in 2 kg of water constitutes a solution with a boiling point of…2025 · 29 Jan · Shift 1 · Q1 · MCQ
  21. If A2​B is 30% ionised in an aqueous solution, then the value of van't Hoff factor (i) is ​ × 10−1.2025 · 29 Jan · Shift 1 · Q23 · Numerical
  22. Given below are two statements : Statement (I): NaCl is added to the ice at 0°C, present in the ice cream box to prevent the melting of ice cream. Statement (II): On addition of NaCl to ice at 0°C, there is a depression in freezing point.…2025 · 29 Jan · Shift 2 · Q3 · MCQ
  23. We have three aqueous solutions of NaCl labelled as 'A', 'B' and 'C' with concentration 0.1M, 0.01M and 0.001M, respectively. The value of van 't Hoff…2024 · 1 Feb · Shift 1 · Q11 · MCQ
  24. Mass of ethylene glycol (antifreeze) to be added to 18.6 kg of water to protect the freezing point at −24∘C is ​kg(Molar mass in g mol−1 for…2024 · 1 Feb · Shift 2 · Q22 · Numerical
  25. 2.5 g of a non-volatile, non-electrolyte is dissolved in 100 g of water at 25∘C. The solution showed a boiling point elevation by 2∘C. Assuming the solute concentration is…2024 · 4 Apr · Shift 1 · Q21 · Numerical
  26. 2.7 kg of each of water and acetic acid are mixed. The freezing point of the solution will be −x∘C. Consider the acetic acid does not dimerise in water, nor dissociates in water.…2024 · 4 Apr · Shift 2 · Q25 · Numerical
  27. An artificial cell is made by encapsulating 0.2 M glucose solution within a semipermeable membrane. The osmotic pressure developed when the artificial cell is placed within a 0.05 M solution of NaCl at 300 K…2024 · 5 Apr · Shift 1 · Q25 · Numerical
  28. Considering acetic acid dissociates in water, its dissociation constant is 6.25×10−5. If 5 mL of acetic acid is dissolved in 1 litre water, the solution will freeze at −x×10−2∘C,…2024 · 5 Apr · Shift 2 · Q24 · Numerical
  29. When 'x' ×10−2 mL methanol (molar mass =32 g' density =0.792 g/cm3) is added to 100 mL. water (density =1 g/cm3), the following diagram is… Includes diagram2024 · 6 Apr · Shift 2 · Q23 · Numerical
  30. A solution containing 10 g of an electrolyte AB2​ in 100 g of water boils at 100.52∘C. The degree of ionization of the electrolyte (α) is ​×10−1…2024 · 8 Apr · Shift 1 · Q26 · Numerical
  31. 0.05M CuSO4​ when treated with 0.01M K2​Cr2​O7​ gives green colour solution of Cu2​Cr2​O7​. The two solutions are separated as shown below :… Includes diagram2024 · 9 Apr · Shift 1 · Q4 · MCQ
  32. The vapor pressure of pure benzene and methyl benzene at 27∘C is given as 80 Torr and 24 Torr, respectively. The mole fraction of methyl benzene in vapor phase, in equilibrium with an equimolar mixture of those two…2024 · 9 Apr · Shift 2 · Q30 · Numerical
  33. A solution of two miscible liquids showing negative deviation from Raoult's law will have :2024 · 27 Jan · Shift 1 · Q7 · MCQ
  34. The osmotic pressure of a dilute solution is 7×105 Pa at 273 K. Osmotic pressure of the same solution at 283 K is ​×104Nm−2.2024 · 29 Jan · Shift 1 · Q30 · Numerical
  35. What happens to freezing point of benzene when small quantity of napthalene is added to benzene?2024 · 30 Jan · Shift 1 · Q8 · MCQ
  36. The solution from the following with highest depression in freezing point/lowest freezing point is2024 · 30 Jan · Shift 2 · Q5 · MCQ
  37. Identify the mixture that shows positive deviations from Raoult's Law2024 · 31 Jan · Shift 1 · Q6 · MCQ
  38. 25 mL of an aqueous solution of KCl was found to require 20 mL of 1 M AgNO3​ solution when titrated using K2​CrO4​ as an indicator. What is the depression in freezing point of KCl solution of the given concentration? ​…2023 · 1 Feb · Shift 1 · Q12 · Numerical
  39. 20% of acetic acid is dissociated when its 5 g is added to 500 mL of water. The depression in freezing point of such water is ​×10−3∘C. Atomic mass of C,H…2023 · 1 Feb · Shift 2 · Q19 · Numerical
  40. Mass of Urea (NH2​CONH2​) required to be dissolved in 1000 g of water in order to reduce the vapour pressure of water by 25% is ​ g. (Nearest integer) Given:…2023 · 6 Apr · Shift 1 · Q18 · Numerical
  41. Consider the following pairs of solution which will be isotonic at the same temperature. The number of pairs of solutions is / are ​. A. 1 M aq. NaCl and 2 M aq. urea B. 1 M…2023 · 6 Apr · Shift 2 · Q23 · Numerical
  42. The vapour pressure vs. temperature curve for a solution solvent system is shown below. The boiling point of the solvent is ​∘C. Includes diagram2023 · 8 Apr · Shift 1 · Q21 · Numerical
  43. If the boiling points of two solvents X and Y (having same molecular weights) are in the ratio 2:1 and their enthalpy of vaporizations are in the ratio 1:2, then the boiling point elevation constant of X is m​…2023 · 8 Apr · Shift 2 · Q17 · Numerical
  44. If the degree of dissociation of aqueous solution of weak monobasic acid is determined to be 0.3, then the observed freezing point will be ​% higher than the expected/theoretical freezing point. (Nearest integer)2023 · 10 Apr · Shift 1 · Q23 · Numerical
  45. An aqueous solution of volume 300 cm3 contains 0.63 g of protein. The osmotic pressure of the solution at 300 K is 1.29 mbar. The molar mass of the protein is ​g mol−1…2023 · 10 Apr · Shift 2 · Q12 · Numerical
  46. 0.004 M K 2​ SO 4​ solution is isotonic with 0.01 M glucose solution. Percentage dissociation of K 2​ SO 4​ is ​ (Nearest integer)2023 · 11 Apr · Shift 1 · Q17 · Numerical
  47. What weight of glucose must be dissolved in 100 g of water to lower the vapour pressure by 0.20 mm Hg? (Assume dilute solution is being formed) Given : Vapour pressure of pure water is 54.2 mm Hg…2023 · 11 Apr · Shift 2 · Q8 · MCQ
  48. 80 mole percent of MgCl2​ is dissociated in aqueous solution. The vapour pressure of 1.0 molal aqueous solution of MgCl2​ at 38∘C is ​mm Hg. (Nearest integer)…2023 · 12 Apr · Shift 1 · Q15 · Numerical
  49. Solution of 12 g of non-electrolyte (A) prepared by dissolving it in 1000 mL of water exerts the same osmotic pressure as that of 0.05 M glucose solution at the same temperature. The empirical formula of…2023 · 13 Apr · Shift 1 · Q19 · Numerical
  50. Sea water contains 29.25% NaCl and 19% MgCl2​ by weight of solution. The normal boiling point of the sea water is ​∘C(Nearest integer) Assume 100% ionization…2023 · 13 Apr · Shift 2 · Q18 · Numerical
  51. The vapour pressure of 30%(w/v) aqueous solution of glucose is ​mm Hg at 25∘C. [Given : The density of 30%(w/v), aqueous solution of glucose is 1.2 g cm−3…2023 · 15 Apr · Shift 1 · Q19 · Numerical
  52. In the depression of freezing point experiment A. Vapour pressure of the solution is less than that of pure solvent B. Vapour pressure of the solution is more than that of pure solvent C. Only solute molecules solidify at the freezing…2023 · 24 Jan · Shift 1 · Q10 · MCQ
  53. The total pressure observed by mixing two liquids A and B is 350 mm Hg when their mole fractions are 0.7 and 0.3 respectively. The total pressure becomes 410 mm Hg if the mole fractions are changed to 0.2 and 0.8 respectively for A and B.…2023 · 24 Jan · Shift 2 · Q21 · Numerical
  54. The osmotic pressure of solutions of PVC in cyclohexanone at 300 K are plotted on the graph. The molar mass of PVC is ​ g mol −1 (Nearest integer) (Given : R = 0.083 L atm K −1 mol −1) Includes diagram2023 · 25 Jan · Shift 1 · Q17 · Numerical
  55. The number of pairs of the solutions having the same value of the osmotic pressure from the following is ​. (Assume 100% ionization) A. 0.500 M C2​H5​OH (aq) and 0.25 M KBr (aq) B. 0.100 M K4​[Fe(CN)6​] (aq)…2023 · 25 Jan · Shift 2 · Q15 · Numerical
  56. Solid Lead nitrate is dissolved in 1 litre of water. The solution was found to boil at 100.15 ∘ C. When 0.2 mol of NaCl is added to the resulting solution, it was observed that the solution froze at −0.8∘ C. The solubility…2023 · 29 Jan · Shift 1 · Q17 · Numerical
  57. Match List I with List II Choose the correct answer from the options given below : Includes table2023 · 29 Jan · Shift 2 · Q11 · MCQ
  58. A solution containing 2 g of a non-volatile solute in 20 g of water boils at 373.52 K. The molecular mass of the solute is ​g mol−1. (Nearest integer)…2023 · 30 Jan · Shift 1 · Q21 · Numerical
  59. Lead storage battery contains 38% by weight solution of H2​SO4​. The van't Hoff factor is 2.67 at this concentration. The temperature in Kelvin at which the solution in the battery will freeze is ​…2023 · 30 Jan · Shift 2 · Q22 · Numerical
  60. At 27∘C, a solution containing 2.5 g of solute in 250.0 mL of solution exerts an osmotic pressure of 400 Pa. The molar mass of the solute is ​g mol−1…2023 · 31 Jan · Shift 1 · Q20 · Numerical
  61. Evaluate the following statements for their correctness. A. The elevation in boiling point temperature of water will be same for 0.1MNaCl and 0.1M urea. B. Azeotropic mixtures boil without change in…2023 · 31 Jan · Shift 2 · Q6 · MCQ
  62. The osmotic pressure of blood is 7.47 bar at 300 K. To inject glucose to a patient intravenously, it has to be isotonic with blood. The concentration of glucose solution in gL − 1 is ​. (Molar mass of glucose =…2022 · 24 Jun · Shift 1 · Q14 · Numerical
  63. A company dissolves 'x' amount of CO2​ at 298 K in 1 litre of water to prepare soda water. X = ​× 10 − 3 g. (nearest integer) (Given : partial pressure of CO2​ at 298 K = 0.835 bar. Henry's law constant…2022 · 24 Jun · Shift 2 · Q15 · Numerical
  64. The depression in freezing point observed for a formic acid solution of concentration 0.5 mL L−1 is 0.0405∘C. Density of formic acid is 1.05 g mL−1. The Van't Hoff factor…2022 · 25 Jul · Shift 1 · Q3 · MCQ
  65. Two solutions A and B are prepared by dissolving 1 g of non-volatile solutes X and Y, respectively in 1 kg of water. The ratio of depression in freezing points for A and B is found to be 1 : 4. The ratio of molar masses of X and Y is2022 · 25 Jul · Shift 2 · Q2 · MCQ
  66. Solute A associates in water. When 0.7 g of solute A is dissolved in 42.0 g of water, it depresses the freezing point by 0.2 ∘ C. The percentage association of solute A in water, is : [Given : Molar mass of A = 93 g mol − 1. Molal…2022 · 25 Jun · Shift 2 · Q3 · MCQ
  67. The elevation in boiling point for 1 molal solution of non-volatile solute A is 3 K. The depression in freezing point for 2 molal solution of A in the same solvent is 6 K. The ratio of Kb​ and Kf​ i.e., Kb​/Kf​…2022 · 26 Jul · Shift 2 · Q15 · Numerical
  68. A 0.5 percent solution of potassium chloride was found to freeze at − 0.24 ∘ C. The percentage dissociation of potassium chloride is ​. (Nearest integer) (Molal depression constant for water is 1.80 K kg…2022 · 26 Jun · Shift 1 · Q13 · Numerical
  69. The osmotic pressure exerted by a solution prepared by dissolving 2.0 g of protein of molar mass 60 kg mol − 1 in 200 mL of water at 27 ∘ C is ​ Pa. [integer value] (use R = 0.083 L bar mol − 1 K − 1)2022 · 26 Jun · Shift 2 · Q19 · Numerical
  70. Boiling point of a 2% aqueous solution of a non-volatile solute A is equal to the boiling point of 8% aqueous solution of a non-volatile solute B. The relation between molecular weights of A and B is2022 · 27 Jul · Shift 1 · Q5 · MCQ
  71. When a certain amount of solid A is dissolved in 100 g of water at 25∘C to make a dilute solution, the vapour pressure of the solution is reduced to one-half of that of pure water. The vapour pressure of pure…2022 · 27 Jul · Shift 2 · Q17 · Numerical
  72. Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : At 10 ∘ C, the density of a 5 M solution of KCl [atomic masses of K & Cl are 39 & 35.5 g mol − 1…2022 · 27 Jun · Shift 1 · Q1 · MCQ
  73. 2 g of a non-volatile non-electrolyte solute is dissolved in 200 g of two different solvents A and B whose ebullioscopic constants are in the ratio of 1 : 8. The elevation in boiling points of A and B are in the ratio yx​ (x :…2022 · 27 Jun · Shift 1 · Q12 · Numerical
  74. A solution containing 2.5 × 10 − 3 kg of a solute dissolved in 75 × 10 − 3 kg of water boils at 373.535 K. The molar mass of the solute is ​ g mol − 1. [nearest integer] (Given : Kb(H2​O) =…2022 · 27 Jun · Shift 2 · Q18 · Numerical
  75. 150 g of acetic acid was contaminated with 10.2 g ascorbic acid (C6​H8​O6​) to lower down its freezing point by (x×10−1)∘C.…2022 · 28 Jul · Shift 1 · Q16 · Numerical
  76. A gaseous mixture of two substances A and B, under a total pressure of 0.8 atm is in equilibrium with an ideal liquid solution. The mole fraction of substance A is 0.5 in the vapour phase and 0.2 in the liquid phase. The vapour…2022 · 28 Jul · Shift 2 · Q16 · Numerical
  77. The vapour pressures of two volatile liquids A and B at 25 ∘ C are 50 Torr and 100 Torr, respectively. If the liquid mixture contains 0.3 mole fraction of A, then the mole fraction of liquid B in the vapour phase is ${x \over…2022 · 28 Jun · Shift 1 · Q18 · Numerical
  78. 2.5 g of protein containing only glycine (C2​H5​NO2​) is dissolved in water to make 500 mL of solution. The osmotic pressure of this solution at 300 K is found to be 5.03 × 10 − 3 bar. The total number of glycine units present…2022 · 28 Jun · Shift 2 · Q14 · Numerical
  79. If O2​ gas is bubbled through water at 303 K, the number of millimoles of O2​ gas that dissolve in 1 litre of water is ​. (Nearest Integer) (Given : Henry's Law constant for O2​…2022 · 29 Jul · Shift 1 · Q19 · Numerical
  80. 1.80 g of solute A was dissolved in 62.5 cm3 of ethanol and freezing point of the solution was found to be 155.1 K. The molar mass of solute A is ​ g mol−1.…2022 · 29 Jul · Shift 2 · Q17 · Numerical
  81. 1.2 mL of acetic acid is dissolved in water to make 2.0 L of solution. The depression in freezing point observed for this strength of acid is 0.0198 ∘ C. The percentage of dissociation of the acid is ​.…2022 · 29 Jun · Shift 1 · Q12 · Numerical
  82. Elevation in boiling point for 1.5 molal solution of glucose in water is 4 K. The depression in freezing point for 4.5 molal solution of glucose in water is 4 K. The ratio of molal elevation constant to molal depression constant (Kb/Kf) is…2022 · 29 Jun · Shift 2 · Q16 · Numerical
  83. For a solution of the gases A, B, C and D in water at 298 K, the values of Henry's law constant (KH) are 30.40, 2.34, 1.56 × 10 − 5 and 0.513 k bar respectively. In the given graph, the lines marked as 'p' and 's' correspond… Includes diagram2022 · 30 Jun · Shift 1 · Q2 · MCQ
  84. AB2​ is 10% dissociated in water to A2+ and B −. The boiling point of a 10.0 molal aqueous solution of AB2​ is ​∘ C. (Round off to the Nearest Integer). [Given : Molal elevation constant of water…2021 · 16 Mar · Shift 1 · Q20 · Numerical
  85. At 363 K, the vapour pressure of A is 21 kPa and that of B is 18 kPa. One mole of A and 2 moles of B are mixed. Assuming that this solution is ideal, the vapour pressure of the mixture is ​ kPa. (Round off to the…2021 · 16 Mar · Shift 2 · Q23 · Numerical
  86. The oxygen dissolved in water exerts a partial pressure of 20 kPa in the vapour above water. The molar solubility of oxygen in water is ​× 10 − 5 mol dm − 3. (Round off to the Nearest Integer). [Given :…2021 · 17 Mar · Shift 1 · Q22 · Numerical
  87. A 1 molal K4​Fe(CN)6​ solution has a degree of dissociation of 0.4. Its boiling point is equal to that of another solution which contains 18.1 weight percent of a non electrolytic solute A. The molar mass of A is ​…2021 · 17 Mar · Shift 2 · Q19 · Numerical
  88. 2 molal solution of a weak acid HA has a freezing point of 3.885 ∘ C. The degree of dissociation of this acid is ​× 10 − 3. (Round off to the Nearest Integer). [Given : Molal depression constant of…2021 · 18 Mar · Shift 1 · Q22 · Numerical
  89. A solute A dimerizes in water. The boiling point of a 2 molal solution of A is 100.52 ∘ C. The percentage association of A is ​. (Round off to the Nearest Integer). [Use : Kb for water = 0.52 K kg mol − 1…2021 · 18 Mar · Shift 2 · Q22 · Numerical
  90. At 20 ∘ C, the vapour pressure of benzene is 70 torr and that of methyl benzene is 20 torr. The mole fraction of benzene in the vapour phase at 20 ∘ above an equimolar mixture of benzene and methyl benzene is ​…2021 · 20 Jul · Shift 1 · Q21 · Numerical
  91. The vapour pressures of A and B at 25 ∘ C are 90 mm Hg and 15 mm Hg respectively. If A and B are mixed such that the mole fraction of A in the mixture is 0.6, then the mole fraction of B in the vapour phase is x × 10 − 1.…2021 · 20 Jul · Shift 2 · Q19 · Numerical
  92. Which one of the following 0.06 M aqueous solutions has lowest freezing point?2021 · 22 Jul · Shift 2 · Q14 · MCQ
  93. When 9.45 g of CICH2​COOH is added to 500 mL of water, its freezing point drops by 0.5°C. The dissociation constant of CICH2​COOH is x × 10-3. The value of x is ​. (Rounded off to the nearest integer)…2021 · 24 Feb · Shift 1 · Q18 · Numerical
  94. C6​H6​ freezes at 5.5 ∘ C. The temperature at which a solution of 10g of C4​H10​ in 200g of C6​H6​ freeze is ​∘ C. (The molal freezing point depression constant of C6​H6​ is 5.12 ∘ C/m.)2021 · 24 Feb · Shift 2 · Q19 · Numerical
  95. 1 molal aqueous solution of an electrolyte A2​B3​ is 60% ionised. The boiling point of the solution at 1 atm is ​ K. (Rounded off to the nearest integer) [Given Kb for (H2​O) = 0.52 K kg mol − 1]2021 · 25 Feb · Shift 1 · Q21 · Numerical
  96. If a compound AB dissociates to the extent of 75% in an aqueous solution, the molality of the solution which shows a 2.5 K rise in the boiling point of the solution is ​ molal. (Rounded off to the nearest integer)…2021 · 25 Feb · Shift 2 · Q17 · Numerical
  97. CO2​ gas is bubbled through water during a soft drink manufacturing process at 298 K. If CO2​ exerts a partial pressure of 0.835 bar then x m mol of CO2​ would dissolve in 0.9 L of water. The value of x is ​.…2021 · 25 Jul · Shift 1 · Q18 · Numerical
  98. When 3.00 g of a substance 'X' is dissolved in 100 g of CCl4​, it raises the boiling point by 0.60 K. The molar mass of the substance 'X' is ​ g mol − 1. (Nearest integer). [Given Kb for CCl4​ is 5.0 K kg mol…2021 · 25 Jul · Shift 2 · Q23 · Numerical
  99. Of the following four aqueous solutions, total number of those solutions whose freezing point is lower than that of 0.10 M C2​H5​OH is ​ (Integer answer) (i) 0.10 M Ba3​(PO4​)2​ (ii) 0.10 M Na2​SO4​ (iii)…2021 · 26 Aug · Shift 1 · Q15 · Numerical
  100. 83 g of ethylene glycol dissolved in 625 g of water. The freezing point of the solution is ​ K. (Nearest integer) [Use : Molal Freezing point depression constant of water = 1.86 K kg mol − 1] Freezing Point of…2021 · 26 Aug · Shift 2 · Q20 · Numerical
  101. 224 mL of SO2​(g) at 298 K and 1 atm is passed through 100 mL of 0.1 M NaOH solution. The non-volatile solute produced is dissolved in 36g of water. The lowering of vapour pressure of solution (assuming the solution in dilute) (P (H2​O)o​−…2021 · 26 Feb · Shift 1 · Q21 · Numerical
  102. When 12.2 g of benzoic acid is dissolved in 100 g of water, the freezing point of solution was found to be − 0.93 ∘ C (Kf(H2​O) = 1.86 K kg mol − 1). The number (n) of benzoic acid molecules associated (assuming 100%…2021 · 26 Feb · Shift 2 · Q17 · Numerical
  103. 1 kg of 0.75 molal aqueous solution of sucrose can be cooled up to − 4 ∘ C before freezing. The amount of ice (in g) that will be separated out is ​. (Nearest integer) [Given : Kf(H2​O) = 1.86 K kg mol −…2021 · 27 Aug · Shift 1 · Q16 · Numerical
  104. 40 g of glucose (Molar mass = 180) is mixed with 200 mL of water. The freezing point of solution is ​ K. (Nearest integer) [Given : Kf = 1.86 K kg mol − 1; Density of water = 1.00 g cm − 3; Freezing point of…2021 · 27 Aug · Shift 2 · Q17 · Numerical
  105. 1.46 g of a biopolymer dissolved in a 100 mL water at 300 K exerted an osmotic pressure of 2.42 × 10 − 3 bar. The molar mass of the biopolymer is ​× 104 g mol − 1. (Round off to the Nearest Integer)…2021 · 27 Jul · Shift 1 · Q16 · Numerical
  106. In a solvent 50% of an acid HA dimerizes and the rest dissociates. The van't Hoff factor of the acid is ​× 10 − 2. (Round off to the nearest integer)2021 · 27 Jul · Shift 2 · Q19 · Numerical
  107. Which one of the following 0.10 M aqueous solutions will exhibit the largest freezing point depression?2021 · 31 Aug · Shift 1 · Q12 · MCQ
  108. 1.22 g of an organic acid is separately dissolved in 100 g of benzene (Kb = 2.6 K kg mol − 1) and 100 g of acetone (Kb = 1.7 K kg mol − 1). The acid is known to dimerize in benzene but remain as a monomer in acetone. The boiling point…2021 · 31 Aug · Shift 2 · Q15 · Numerical
  109. The size of a raw mango shrinks to a much smaller size when kept in a concentrated salt solution. Which one of the following processes can explain this?2020 · 2 Sep · Shift 2 · Q14 · MCQ
  110. Henry’s constant (in kbar) for four gases α, β, γ and δ in water at 298 K is given below : (density of water = 103 kg m-3 at 298 K) This table implies that : Includes table2020 · 3 Sep · Shift 1 · Q13 · Multiple correct
  111. If 250 cm3 of an aqueous solution containing 0.73 g of a protein A is isotonic with one litre of another aqueous solution containing 1.65 g of a protein B, at 298 K, the ratio of the molecular masses of A and B is…2020 · 3 Sep · Shift 2 · Q19 · Numerical
  112. At 300 K, the vapour pressure of a solution containing 1 mole of n-hexane and 3 moles of n-heptane is 550 mm of Hg. At the same temperature, if one more mole of n-heptane is added to this solution, the vapour pressure of the solution…2020 · 4 Sep · Shift 1 · Q8 · Numerical
  113. The osmotic pressure of a solution of NaCl is 0.10 atm and that of a glucose solution is 0.20 atm. The osmotic pressure of a solution formed by mixing 1 L of the sodium chloride solution with 2 L of the glucose solution is x × 10–3…2020 · 4 Sep · Shift 2 · Q11 · Numerical
  114. The elevation of boiling point of 0.10 m aqueous CrCl3​.xNH3​ solution is two times that of 0.05 m aqueous CaCl2​ solution. The value of x is ​. [Assume 100% ionisation of the complex and CaCl2​, coordination…2020 · 6 Sep · Shift 1 · Q2 · Numerical
  115. A set of solutions is prepared using 180 g of water as a solvent and 10 g of different nonvolatile solutes A, B and C. The relative lowering of vapour pressure in the presence of these solutes are in the order : [Given, molar mass of A =…2020 · 6 Sep · Shift 2 · Q15 · MCQ
  116. At 35oC, the vapour pressure of CS2​ is 512 mm. Hg and that of acetone is 344 mm Hg. A solution of CS2​ in acetone has a total vapour pressure of 600 mm Hg. The false statement amongst the following is :2020 · 7 Jan · Shift 1 · Q18 · MCQ
  117. Two open beakers one containing a solvent and the other containing a mixture of that solvent with a non voltatile solute are together selated in a container. Over time :2020 · 7 Jan · Shift 2 · Q1 · MCQ
  118. A graph of vapour pressure and temperature for three different liquids X, Y, and Z is shown below : The following inferences are made : (A) X has higher intermolecular interactions compared to Y. (B) X has lower intermolecular interactions… Includes diagram2020 · 8 Jan · Shift 1 · Q2 · MCQ
  119. How much amount of NaCl should be added to 600 g of water (ρ = 1.00 g/mL) to decrease the freezing point of water to – 0.2 °C ? ​. (The freezing point depression constant for water = 2K kg mol–1)2020 · 9 Jan · Shift 1 · Q10 · Numerical
  120. A cylinder containing an ideal gas (0.1 mol of 1.0 dm3) is in thermal equilibrium with a large volume of 0.5 molal aqueous solution of ethylene glycol at its freezing point. If the stoppers S1​ and S2​ (as shown in the figure) are… Includes diagram2020 · 9 Jan · Shift 2 · Q9 · Numerical
  121. The vapour pressures of pure liquids A and B are 400 and 600 mmHg, respectively at 298 K on mixing the two liquids, the sum of their initial volume is equal ot the volume of the final mixture. The mole fraction of liquid B is 0.5 in the…2019 · 8 Apr · Shift 1 · Q21 · MCQ
  122. For the solution of the gases w, x, y and z in water at 298K, the Henrys law constants (KH) are 0.5, 2, 35 and 40 kbar, respectively. The correct plot for the given data is :-2019 · 8 Apr · Shift 2 · Q1 · MCQ
  123. Liquid 'M' and liquid 'N' form an ideal solution. The vapour pressures of pure liquids 'M' and 'N' are 450 and 700 mmHg, respectively, at the same temperature. Then correct statement is: (xM = Mole fraction of 'M' in solution ; xN = Mole…2019 · 9 Apr · Shift 1 · Q22 · MCQ
  124. The osmotic pressure of a dilute solution of an ionic compound XY in water is four times that of a solution of 0.01 M BaCl2​ in water. Assuming complete dissociation of the given ionic compounds in water, the concentration of XY (in…2019 · 9 Apr · Shift 1 · Q7 · MCQ
  125. Molal depression constant for a solvent is 4.0 kg mol–1. The depression in the freezing point of the solvent for 0.03 mol kg–1 solution of K2​SO4​ is : (Assume complete dissociation of the electrolyte)2019 · 9 Apr · Shift 2 · Q2 · MCQ
  126. Which one of the following statements regarding Henry's law is not correct ?2019 · 9 Jan · Shift 1 · Q16 · MCQ
  127. A solution containing 62 g ethylene glycol in 250 g water is cooled to − 10oC. If Kf for water is 1.86 K kg mol − 1 , the amount of water (in g) separated as ice is :2019 · 9 Jan · Shift 2 · Q13 · MCQ
  128. At room temperature, a dilute solution of urea is prepared by dissolving 0.60 of urea in 360 g of water. If the vapour pressure of pure water at this temperature is 35 mm Hg, lowering of vapour pressure will be. (molar mass of urea = 60 g…2019 · 10 Apr · Shift 1 · Q9 · MCQ
  129. 1 g of a non-volatile non-electrolyte solute is dissolved in 100 g of two different solvents A and B whose ebullioscopic constants are in the ratio of 1 : 5. The ratio of the elevation in their boiling points, ΔTb​(B)ΔTb​(A)​…2019 · 10 Apr · Shift 2 · Q8 · MCQ
  130. Liquids A and B form an ideal solution in the entire composition range. At 350 K, the vaapor pressures of pure A and pure B are 7 × 103 Pa and 12 × 103 Pa, respectively . The composition of the vapor in equilibriumwith a…2019 · 10 Jan · Shift 1 · Q15 · MCQ
  131. Elevation in the boiling point for 1 molar solution of glucose is 2 K. The depression in the freezing point for 2 molal solution of glucose in the same solvent is 2 K. The relation between Kb and Kf is2019 · 10 Jan · Shift 2 · Q15 · MCQ
  132. The freezing point of a diluted milk sample is found to be –0.2oC, while it should have been –0.5oC for pure milk. How much water has been added to pure milk to make the diluted sample?2019 · 11 Jan · Shift 1 · Q17 · MCQ
  133. K2​Hgl4​ is 40% ionised in aqueous solution. The value of its van't Hoff factor (i) is:2019 · 11 Jan · Shift 2 · Q19 · MCQ
  134. A solution is prepared by dissolving 0.6 g of urea (molar mass = 60 g mol–1) and 1.8 g of glucose (molar mass = 180 g mol–1) in 100 mL of water at 27oC. The osmotic pressure of the solution is : (R = 0.08206 L atm K–1 mol–1)2019 · 12 Apr · Shift 2 · Q9 · MCQ
  135. Freezing point of a 4% aqueous solution of X is equal to freezing point of 12% aqueous solution of Y. If molecular weight of X is A, then molecular weight of Y is -2019 · 12 Jan · Shift 1 · Q13 · MCQ
  136. Molecules of benzoic acid (C6​H5​COOH) dimerise in benzene. 'w' g of the acid dissolved in 30 g of benzene shows a depression in freezing point equal to 2K. If the percentage association of the acid to form dimmer in the solution is 80,…2019 · 12 Jan · Shift 2 · Q19 · MCQ
  137. Two 5 molal solutions are prepared by dissolving a non-electrolyte non-volatile solute separately in the solvents X and Y. The molecular weights of the solvents are Mx and My, respectively where Mx = 43​ My. The relative lowering…2018 · 15 Apr · Shift 2 · Q12 · MCQ
  138. The mass of a non-volatile, non-electrolyte solute (molar mass = 50 g mol-1 ) needed to be dissolved in 114 g octane to reduce its vapour pressure to 75%, is :2018 · 16 Apr · Shift 1 · Q21 · MCQ
  139. For 1 molal aqueous solution of the following compounds, which one will show the highest freezing point?2018 · Shift 0 · Q21 · MCQ
  140. 5 g of Na2​SO4​ was dissolved in x g of H2​O. The change in freezing point was found to be 3.82oC. If Na2​SO4​ is 81.5% ionised, the value of x (Kf for water=1.86oC kg mol−1) is approximately : (molar mass of S = 32 g mol−1 and that…2017 · 8 Apr · Shift 1 · Q21 · MCQ
  141. A solution is prepared by mixing 8.5 g of CH2​Cl2​ and 11.95 g of CHCl3​ . If vapour pressure of CH2​Cl2​ and CHCl3​ at 298 K are 415 and 200 mmHg respectively, the mole fraction of CHCl3​ in vapour form is : (Molar mass of Cl =…2017 · 9 Apr · Shift 1 · Q18 · MCQ
  142. The freezing point of benzene decreases by 0.450C when 0.2 g of acetic acid is added to 20g of benzene. If acetic acid associates to form a dimer in benzene, percentage association of acetic acid in benzene will be: (Kf for benzene = 5.12…2017 · Shift 0 · Q19 · MCQ
  143. The solubility of N2​ in water at 300 K and 500 torr partial pressure is 0.01 g L−1. The solubility (in g L−1) at 750 torr partial pressure is :2016 · 9 Apr · Shift 1 · Q19 · MCQ
  144. An aqueous solution of a salt MX2​ at certain temperature has a van’t Hoff factor of 2. The degree of dissociation for this solution of the salt is :2016 · 10 Apr · Shift 1 · Q12 · MCQ
  145. 18 g glucose (C6​H12​O6​) is added to 178.2 g water. The vapor pressure of water (in torr) for this aqueous solution is :2016 · Shift 0 · Q3 · MCQ
  146. The vapour pressure of acetone at 20oC is 185 torr. When 1.2 g of a non-volatile substance was dissolved in 100 g of acetone at 20oC, its vapour pressure was 183 torr. The molar mass (g mol-1) of the substance is:2015 · Shift 0 · Q1 · MCQ
  147. Consider separate solutions of 0.500 M C2​H5​OH(aq), 0.100 M Mg3​(PO4​)2​(aq), 0.250 M KBr(aq) and 0.125 M Na3​PO4​(aq) at 25oC. Which statement is true about these solutions, assuming all salts to be strong electrolytes?2014 · Shift 0 · Q2 · MCQ
  148. Kf for water is 1.86K kg mol–1. If your automobile radiator holds 1.0 kg of water, how many grams of ethylene glycol (C2​H6​O2​) must you add to get the freezing point of the solution lowered to –2.8oC ?2012 · Shift 0 · Q1 · MCQ
  149. The degree of dissociation (α ) of a weak electrolyte, AxBy is related to van’t Hoff factor (i) by the expression :2011 · Shift 0 · Q2 · MCQ
  150. Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to prevent it from freezing at −6oC will be : [Kf for water = 1.86 K kg mol−1 , and molar mass of ethylene glycol =…2011 · Shift 0 · Q7 · MCQ
  151. On mixing, heptane and octane form an ideal solution. At 373 K, the vapour pressures of the two liquid components (heptane and octane) are 105 kPa and 45 kPa respectively. Vapour pressure of the solution obtained by mixing 25.0g of heptane…2010 · Shift 0 · Q22 · MCQ
  152. If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous solution, the change in freezing point of water (∆Tf), when 0.01 mol of sodium sulphate is dissolved in 1 kg of water, is (Kf = 1.86 K kg…2010 · Shift 0 · Q23 · MCQ
  153. A binary liquid solution is prepared by mixing n-heptane and ethanol. Which one of the following statements is correct regarding the behaviour of the solution ?2009 · Shift 0 · Q1 · MCQ
  154. Two liquids X and Y form an ideal solution. At 300K, vapour pressure of the solution containing 1 mol of X and 3 mol of Y is 550 mm Hg. At the same temperature, if 1 mol of Y is further added to this solution, vapour pressure of the…2009 · Shift 0 · Q8 · MCQ
  155. The vapour pressure of water at 20oC is 17.5 mm Hg. If 18 g of glucose (C6​H12​O6​) is added to 178.2 g of water at 20oC, the vapour pressure of the resulting solution will be2008 · Shift 0 · Q24 · MCQ
  156. At 80oC, the vapour pressure of pure liquid ‘A’ is 520 mm Hg and that of pure liquid ‘B’ is 1000 mm Hg. If a mixture solution of ‘A’ and ‘B’ boils at 80oC and 1 atm pressure, the amount of ‘A’ in the mixture is (1 atm = 760 mm Hg)2008 · Shift 0 · Q25 · MCQ
  157. A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of 290 mm at 300 K. The vapour pressure of propyl alcohol is 200 mm. If the mole fraction of ethyl alcohol is 0.6, its vapour pressure (in mm) at the same temperature will…2007 · Shift 0 · Q29 · MCQ
  158. A 5.25 % solution of a substance is isotonic with a 1.5% solution of urea (molar mass = 60 g mol−1) in the same solvent. If the densities of both the solutions are assumed to be equal to 1.0 g cm−3, molar mass of the substance will be2007 · Shift 0 · Q30 · MCQ
  159. Among the following mixtures, dipole-dipole as the major interaction, is present in2006 · Shift 0 · Q29 · MCQ
  160. 18 g of glucose (C6​H12​O6​) is added to 178.2 g of water. The vapour pressure of water for this aqueous solution at 100oC is2006 · Shift 0 · Q30 · MCQ
  161. Benzene and toluene form nearly ideal solutions. At 20 oC, the vapour pressure of benzene is 75 torr and that of toluene is 22 torr. The partial vapour pressure of benzene at 20 oC for a solution containing 78 g of benzene and 46 g of…2005 · Shift 0 · Q18 · MCQ
  162. Equimolar solutions in the same solvent have2005 · Shift 0 · Q19 · MCQ
  163. If α is the degree of dissociation of Na2​SO4​, the vant Hoff’s factor (i) used for calculating the molecular mass is :2005 · Shift 0 · Q5 · MCQ
  164. For which of the following parameters the structural isomers C2​H5​OH and CH3​OCH3​ would be expected to have the same values? (Assume ideal behaviour)2004 · Shift 0 · Q31 · MCQ
  165. Which of the following liquid pairs shows a positive deviation from Raoult’s law?2004 · Shift 0 · Q32 · MCQ
  166. Which one of the following aqueous solutions will exhibit highest boiling point?2004 · Shift 0 · Q33 · MCQ
  167. Which one of the following statements is false?2004 · Shift 0 · Q34 · MCQ
  168. A pressure cooker reduces cooking time for food because2003 · Shift 0 · Q30 · MCQ
  169. In a 0.2 molal aqueous solution of a weak acid HX the degree of ionization is 0.3. Taking kf for water as 1.85, the freezing point of the solution will be nearest to2003 · Shift 0 · Q31 · MCQ
  170. If liquids A and B form an ideal solution2003 · Shift 0 · Q32 · MCQ
  171. In a mixture of A and B, components show negative deviation when :2002 · Shift 0 · Q19 · MCQ
  172. Freezing point of an aqueous solution is (-0.186)oC. Elevation of boiling point of the same solution is Kb = 0.512 oC, Kf = 1.86 oC, find the increase in boiling point.2002 · Shift 0 · Q20 · MCQ