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Total Questions : 3241 | Page 5 of 325 pages
Question 41. Pick out the wrong statement. Raoult's law does not apply, when the
  1.    Size of component molecules are not equal
  2.    Attractive forces between like and unlike molecules in the solution are approximately equal
  3.    Component molecules are nonpolar
  4.    Chemical combination or molecular association between unlike molecules takes place in the formation of solution
 Discuss Question
Answer: Option C. -> Component molecules are nonpolar
Question 42. __________ equation applies to diffusivities in liquids.
  1.    Gilliland
  2.    Hirschfelder
  3.    Wilke and Chang
  4.    None of these
 Discuss Question
Answer: Option A. -> Gilliland
Question 43. Pick out the wrong statement:
  1.    Absorption factor is constant, when the equilibrium and operating lines are straight
  2.    In case of a stripper, the equilibrium curve is always below the operating line
  3.    In case of an absorber, the operating line is always above the equilibrium curve
  4.    In the absorption of low solubility gases, the liquid film is the controlling resistance
 Discuss Question
Answer: Option B. -> In case of a stripper, the equilibrium curve is always below the operating line
Question 44. What is the degree of freedom of an absorption process in which only one component is transferred between phases?
  1.    3
  2.    2
  3.    4
  4.    1
 Discuss Question
Answer: Option A. -> 3
Question 45. Separation of a mixture of two gases by absorption in the liquid solvent depends upon the difference in their
  1.    Viscosity
  2.    Density
  3.    Solubility
  4.    Relative volatility
 Discuss Question
Answer: Option C. -> Solubility
Question 46. Schmidt number is given by
  1.    Μ/ρDAB
  2.    Re.Pe
  3.    Sh x Pe
  4.    Re/Pe
 Discuss Question
Answer: Option A. -> Μ/ρDAB
Question 47. Which of the following unit operations makes use of Thiele-Geddes equation?
  1.    Liquid-liquid extraction
  2.    Solid-liquid extraction
  3.    Multicomponent absorption with chemical reaction
  4.    Multicomponent distillation
 Discuss Question
Answer: Option D. -> Multicomponent distillation
Question 48. __________ column is used in gas absorption process.
  1.    Wetted wall
  2.    Seive/perforated tray
  3.    Bubble cap
  4.    Packed
 Discuss Question
Answer: Option D. -> Packed
Question 49. Solvent used in extractive distillation
  1.    Changes the relative volatility of the original components
  2.    Should be of high volatility
  3.    Should form azeotropes with the original components
  4.    All of the above
 Discuss Question
Answer: Option A. -> Changes the relative volatility of the original components
Question 50. Solvent used in extractive distillation
  1.    Is of low volatility
  2.    Forms a low boiling azeotrope
  3.    Forms a high boiling azeotrope
  4.    Does not alter the relative volatility of the original components
 Discuss Question
Answer: Option B. -> Forms a low boiling azeotrope

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