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MCQs

Total Questions : 2307 | Page 9 of 231 pages
Question 81. The rate of the reaction, X → Y, quadruples when the concentration of 'X' is doubled. The rate expression for the reaction is, r = K Cxn, the value of 'n' in this case will be
  1.    0
  2.    1
  3.    2
  4.    3
 Discuss Question
Answer: Option C. -> 2
Question 82. The dispersion number of perfect mixed flow is
  1.    0
  2.    > 150
  3.    ∞
  4.    < 2100
 Discuss Question
Answer: Option C. -> ∞
Question 83. Which of the following is not a chemical step in a fluid solid catalytic reaction?
  1.    Surface chemical reaction
  2.    Adsorption
  3.    Desorption
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 84. For high conversion in a highly exothermic solid catalysed reaction, use a __________ bed reactor.
  1.    Fixed
  2.    Fluidised bed reactor followed by a fixed
  3.    Fixed bed reactor followed by a fluidised
  4.    Fluidised
 Discuss Question
Answer: Option B. -> Fluidised bed reactor followed by a fixed
Question 85. Sometimes, batch process is preferred over continuous process, when the product
  1.    Quality & yield can not be achieved in continuous processes, because of long residence time
  2.    Sales demand is fluctuating
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B
Question 86. The rate of the chemical reaction A → B doubles as the concentration of A i.e.., CA is doubled. If rate of reaction is proportional to CAn, then what is the value of n for this reaction?
  1.    0.5
  2.    1
  3.    0
  4.    2
 Discuss Question
Answer: Option B. -> 1
Question 87. Which of the following fixes the volume of a batch reactor for a particular conversion and production rate?
  1.    Operating conditions (e.g. pressure and temperature)
  2.    Rate constant
  3.    Density of mixture
  4.    None of these
 Discuss Question
Answer: Option C. -> Density of mixture
Question 88. The conversion XA and residence time data are collected for zero order liquid phase reaction in a stirred tank reactor. Which of the following will be a straight line?
  1.    XA Vs . τ
  2.    XA Vs ln τ
  3.    XA/(1 - XA)Vs τ
  4.    XA(1 - XA)Vs τ
 Discuss Question
Answer: Option A. -> XA Vs . τ
Question 89. The 'E' curve for a non-ideal reactor defines the fraction of fluid having age between t and t + dt
  1.    At the inlet
  2.    At the outlet
  3.    In the reactor
  4.    Averaged over the inlet and outlet
 Discuss Question
Answer: Option B. -> At the outlet
Question 90. The reactions with low activation energy are
  1.    Always spantaneous
  2.    Slow
  3.    Fast
  4.    Non-spontaneous
 Discuss Question
Answer: Option C. -> Fast

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