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Solutions

45 questions · Chemistry · NEET
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45 questions · Chemistry · NEET

  1. Match List-I with List-II Choose the correct answer from the options given below: Includes table2025 · Q108 · MCQ
  2. 5 moles of liquid X and 10 moles of liquid Y make a solution having a vapour pressure of 70 torr. The vapour pressures of pure X and Y are 63 torr and 78 torr respectively. Which of the following is true regarding the described…2025 · Q115 · MCQ
  3. Which of the following aqueous solution will exhibit highest boiling point?2025 · Q97 · Multiple correct
  4. The Henry's law constant (KH​) values of three gases (A,B,C) in water are 145,2×10−5 and 35 kbar respectively. The solubility of these gases in water…2024 · Q102 · MCQ
  5. The plot of osmotic pressure (П) vs concentration (mol L−1) for a solution gives a straight line with slope 25.73 L bar mol−1. The temperature at which the osmotic pressure…2024 · Q144 · MCQ
  6. Mass of glucose (C6​H12​O6​) required to be dissolved to prepare one litre of its solution which is isotonic with 15 g L−1 solution of urea (NH3​CONH2​)…2024 · Q148 · MCQ
  7. Which amongst the following aqueous solution of electrolytes will have minimum elevation in boiling point? Choose the correct option :-2023 · Q123 · MCQ
  8. KH value for some gases at the same temperature 'T' are given : where KH is Henry's Law constant in water. The order of their solubility in water is : Includes table2022 · Q116 · MCQ
  9. The following solutions were prepared by dissolving 10 g of glucose (C6H12O6) in 250 ml of water (P1), 10 g of urea (CH4N2O) in 250 ml of water (P2) and 10 g of sucrose (C12H22O11) in 250 ml of water (P3). The right option for the…2021 · Q109 · MCQ
  10. The correct option for the value of vapour pressure of a solution at 45∘C with benzene to octane in molar ratio 3 : 2 is : [At 45∘C vapour pressure of benzene is 280 mm Hg and that of octane is 420 mm Hg. Assume Ideal gas]2021 · Q116 · MCQ
  11. The freezing point depression constant (Kr) of benzene is 5. 12 K kg mol-1. 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 :2020 · Q102 · MCQ
  12. The mixture which shows positive deviation from Raoult's law is :2020 · Q105 · MCQ
  13. For an ideal solution, the correct option is :2019 · Q82 · MCQ
  14. The mixture that forms maximum boiling azeotrope is :2019 · Q95 · MCQ
  15. If molality of the dilute solution is doubled, the value of molal depression constant (Kf) will be2017 · Q88 · MCQ
  16. Which of the following statements about the composition of the vapour over an ideal 1 : 1 molar mixture of benzene and toluene is correct? Assume that the temperature is constant at 25oC. (Given, vapour pressure data at 25oC, benzene =…2016 · Q87 · MCQ
  17. At 100oC the vapour pressure of a solution of 6.5 g of a solute in 100 g water is 732 mm. If Kb = 0.52, the boiling point of this solution will be2016 · Q88 · MCQ
  18. The van't Hoff factor (i) for a dilute aqueous solution of the strong electrolyte barium hydroxide is2016 · Q87 · MCQ
  19. Which one of the following is incorrect for ideal solution?2016 · Q88 · MCQ
  20. The boiling point of 0.2 mol kg−1 solution of X in water is greater than equimolal solution of Y in water. Which one of the following statements is true in this case?2015 · Q81 · MCQ
  21. Which of them is not equal to zero for an ideal solution?2015 · Q82 · MCQ
  22. Which one of the following electrolytes has the same value of van't Hoff factor (i) as that of Al2(SO4)3 (if all are 100% ionised)?2015 · Q83 · MCQ
  23. Of the following 0.10 m aqueous solutions, which one will exhibit the largest freezing point depression?2014 · Q91 · MCQ
  24. Which condition is not satisfied by an ideal solution?2013 · Q87 · MCQ
  25. Vapour pressure of chloroform (CHCl3) and dichloromethane (CH2Cl2) at 25oC are 200 mm Hg and 41.5 mm Hg respectively. Vapour pressure of the solution obtained by mixing 25.5 g of CHCl3 and 40 g of CH2Cl2 at the same temperature will be…2012 · Q69 · MCQ
  26. pA and pB are the vapour pressure of pure liquid components, A and B, respectively of an ideal binary solution. If xA represents the mole fraction of component A, the total pressure of the solution will be2012 · Q99 · MCQ
  27. A 0.1 molal aqueous solution of a weak acid is 30% ionized. If Kf for water is 1.86oC/m, the freezing point of the solution will be2011 · Q66 · MCQ
  28. 200 mL of an aqueous solution of a protein contains its 1.26 g. The osmotic pressure of this solution at 300 K is found to be 2.57 × 10−3 bar. The molar mass of protein will be (R = 0.083 L bar mol−1 K−1)2011 · Q67 · MCQ
  29. The freezing point depression constant for water is −1.86o C m−1. If 5.00 g Na2SO4 is dissolved in 45.0 g H2O, the freezing point is changed by −3.82oC. Calculate the van't Hoff factor for Na2SO4.2011 · Q91 · MCQ
  30. The van't Hoff factor i for a compound which undergoes dissociation in one solvent and association in other solvent is respectively2011 · Q92 · MCQ
  31. A solution of sucrose (molar mass = 342 g mol−) has been prepared by dissolving 68.5 g of sucrose in 1000 g of water. The freezing point of the solution obtained will be (Kf for water = 1.86 K kg mol−1)2010 · Q103 · MCQ
  32. An aqueous solution is 1.00 molal in KI. Which change will cause the vapour pressure of the solution to increase?2010 · Q104 · MCQ
  33. A 0.0020 m aqueous solution of an ionic compound [Co(NH3)5(NO2)]Cl freezes at − 0.00732oC. Number of moles of ions which 1 mol of ionic compound produces on being dissolved in water will be (Kf = −1.86oC/m)2009 · Q96 · MCQ
  34. 0.5 molal aqueous solution of a weak acid (HX) is 20% ionised. If Kf for water is 1.86 K kg mol−1, the lowering in freezing point of the solution is2007 · Q85 · MCQ
  35. During osmosis, flow of water through a semipermeable membrane is2006 · Q93 · MCQ
  36. A solution of acetone in ethanol2006 · Q94 · MCQ
  37. A solution containing 10 g per dm3 of urea (molecular mass = 60 g mol−1) is isotonic with a 5% solution of a nonvolatile solute is2006 · Q95 · MCQ
  38. 1.00 g of a non-electrolyte solute (molar mass 250 g mol−1) was dissolved in 51.2 g of benzene. If the freezing point depression constant, Kf of benzene is 5.12 K kg mol−1, the freezing point of benzene will be lowered by2006 · Q96 · MCQ
  39. The vapour pressure of two liquids P and Q are 80 and 60 torr, respectively. The total vapour pressure of solution obtained by mixing 3 mole of P and 2 mole of Q would be2005 · Q89 · MCQ
  40. A solution has a 1 : 4 mole ratio of pentane to hexane. The vapour pressures of the pure hydrocarbons at 20oC are 440 mm Hg for pentane and 120 mm Hg for hexane. The mole fraction of pentane in the vapour phase would be2005 · Q90 · MCQ
  41. A solution of urea (mol. mass 56 g mol−1) boils at 100.18oC at the atmospheric pressure. If Kf and Kb for water are 1.86 and 0.512 K kg mol−1 respectively, the above solution will freeze at2005 · Q91 · MCQ
  42. A solution containing components A and B folloes Raoult's law2002 · Q95 · MCQ
  43. A solution contains non volatile solute of molecular mass M2. Which of the following can be used to calculate the molecular mass of solute in terms of osmotic pressure?2002 · Q96 · MCQ
  44. Pure water can be obtained from sea water by2001 · Q96 · MCQ
  45. From the colligative properties of solution, which one is the best method for the determination of molecular weight of proteins and polymers?2000 · Q94 · MCQ