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MCQs

Total Questions : 2307 | Page 22 of 231 pages
Question 211. An autothermal reactor is
  1.    Most suitable for a second order reaction
  2.    Most suitable for a reversible reaction
  3.    Completely self-supporting in its thermal energy requirements
  4.    Isothermal in nature
 Discuss Question
Answer: Option C. -> Completely self-supporting in its thermal energy requirements
Question 212. Thermodynamic equilibrium constant in a system is affected by
  1.    Inerts
  2.    Pressure
  3.    Temperature
  4.    All of the above
 Discuss Question
Answer: Option C. -> Temperature
Question 213. With increase in temperature, the rate constant obeying Arhenious equation
  1.    Increases
  2.    Decreases
  3.    Decreases exponentially
  4.    Can either increase or decrease ; depends on the frequency factor
 Discuss Question
Answer: Option C. -> Decreases exponentially
Question 214. A backmix reactor
  1.    Is same as plug-flow reactor
  2.    Is same as ideal stirred tank reactor
  3.    Employs mixing in axial direction only
  4.    Is most suitable for gas phase reaction
 Discuss Question
Answer: Option B. -> Is same as ideal stirred tank reactor
Question 215. A catalyst
  1.    Initiates a reaction
  2.    Lowers the activation energy of reacting molecules
  3.    Is capable of reacting with any one of the reactants
  4.    Can not be recovered chemically unchanged at the end of a chemical reaction
 Discuss Question
Answer: Option B. -> Lowers the activation energy of reacting molecules
Question 216. For reaction, P + 2 → 3R, molar rate of consumption of P is
  1.    Double of that of Q
  2.    Same as that of Q
  3.    Half of that of Q
  4.    2/3rd of that of Q
 Discuss Question
Answer: Option C. -> Half of that of Q
Question 217. For the liquid phase zero order irreversible reaction A → B, the conversion of A in a CSTR is found to be 0.3 at a space velocity of 0.1min⁻¹ . What will be the conversion for a PFR with a space velocity of 0.2 min⁻¹? Assume that all the other operating conditions are the same for CSTR and PFR.
  1.    0.15
  2.    0.30
  3.    0.60
  4.    0.90
 Discuss Question
Answer: Option C. -> 0.60
Question 218. The fractional volume change between no conversion and complete conversion, for the isothermal gas phase reaction, 2A → R, is
  1.    0.5
  2.    -0.5
  3.    1
  4.    1.5
 Discuss Question
Answer: Option B. -> -0.5
Question 219. Molecularity of an elementary reaction, P + Q → R + S is
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option D. -> 4
Question 220. A catalyst in a chemical reaction
  1.    Decreases the activation energy
  2.    Alters the reaction mechanism
  3.    Increases the frequency of collisions of reacting species
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above

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