Ideal and Non-Ideal Solutions MCQ

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• 5 moles of liquid X and 10 moles of liquid Y make a solution having a total vapour pressure 70 torr. The vapour pressures of pure X and pure Y are 64 torr and 76 torr respectively. Which of the following is true regarding the described solution?
  ক

  The solution shows positive deviation

  খ

  The solution shows negative deviation

  গ

  The solution is ideal

  ঘ

  The solution has volume greater than the sum of individual volumes
• If liquids A and B form an ideal solution, then what is the Gibbs free energy of mixing?
  ক

  > 0

  খ

  < 0

  গ

  = 0

  ঘ

  Not Defined
• Which of the following is true regarding azeotropes?
  ক

  An azeotrope does not exhibit the same concentration in the vapour phase and the liquid phase

  খ

  Azeotropic mixtures cannot be separated into their constituents by fractional distillation

  গ

  In case of minimum boiling azeotropes, the boiling point of the azeotrope is higher than the boiling point of either of the pure components

  ঘ

  In case of maximum boiling azeotropes, the boiling point of the azeotrope is lesser than the boiling point of either of the pure components
• Which of the following cannot form an azeotrope?
  ক

  H2O + C2H5OH

  খ

  CHCl3 + C2H5OH

  গ

  HCl + H2O

  ঘ

  Benzene + Toluene
• Which of the following is true regarding non-ideal solutions with negative deviation?
  ক

  The interactions between the components are lesser than in the pure components

  খ

  ΔVmixing = +ve

  গ

  ΔHmixing = +ve

  ঘ

  They form maximum boiling azeotropes
• Which of the following is not an example of a non-ideal solution showing negative deviation?
  ক

  HNO3 + Water

  খ

  HCl + Water

  গ

  Acetic acid + Pyridine

  ঘ

  Carbon tetrachloride + Toluene
• Ideal solutions do not form azeotropes.
  ক

  True

  খ

  False
• Which of the following is an example of a non-ideal solution showing positive deviation?
  ক

  Acetone + Carbon disulphide

  খ

  Chlorobenzene + Bromobenzene

  গ

  Chloroform + Benzene

  ঘ

  Acetone + Aniline
• Which of the following is false regarding Non-Ideal solutions?
  ক

  They do not obey Raoult’s law

  খ

  ΔVmixing ≠ 0

  গ

  ΔHmixing = 0

  ঘ

  They form azeotropes
• A solution which does not obey Raoult’s law is called a non-ideal solution.
  ক

  True

  খ

  False
• Which of the following is not an example of an Ideal solution?
  ক

  Benzene + Toluene

  খ

  n-Hexane + n-Heptane

  গ

  Ethyl alcohol + Water

  ঘ

  Ethyl bromide + Ethyl chloride
• Which of the following statements regarding Ideal solutions is false?
  ক

  Ideal solutions obey Raoult’s law under all conditions of temperature and concentrations

  খ

  There will be some change in volume on mixing the components, i.e., ΔVmixing ≠ 0

  গ

  There will be no change in enthalpy when the two components are mixed, i.e., ΔHmixing = 0

  ঘ

  There will be no change in volume on mixing the components, i.e., ΔVmixing = 0