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MCQs

Total Questions : 2307 | Page 4 of 231 pages
Question 31. 6 gm of carbon is burnt with an amount of air containing 18 gm oxygen. The product contains 16.5 gms CO₂ and 2.8 gms CO besides other constituents. What is the degree of conversion on the basis of disappearance of limiting reactant?
  1.    100%
  2.    95%
  3.    75%
  4.    20%
 Discuss Question
Answer: Option B. -> 95%
Question 32. If in the gaseous phase reaction, N₂O₄ ⇋ 2NO₂, x is the part of N₂O₄ which dissociates, then the number of molecules at equilibrium will be
  1.    (1 + x)
  2.    (1 - x)
  3.    (1 + x)²
  4.    (1 - x)²
 Discuss Question
Answer: Option A. -> (1 + x)
Question 33. Kinetics of a catalytic reaction can be best studied on a/an __________ reactor.
  1.    Mixed
  2.    Integral (plug flow)
  3.    Differential (flow)
  4.    Either A, B and C
 Discuss Question
Answer: Option D. -> Either A, B and C
Question 34. Signal normally used to study non-ideal flow by stimulus response technique is __________ input.
  1.    Pulse
  2.    Step
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B
Question 35. Fluidised bed reactor is characterised by
  1.    Uniformity of temperature
  2.    Comparatively smaller equipment
  3.    Very small pressure drop
  4.    Absence of continuous catalyst regeneration facility
 Discuss Question
Answer: Option A. -> Uniformity of temperature
Question 36. At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R?
  1.    1.6
  2.    2
  3.    2.24
  4.    2.5
 Discuss Question
Answer: Option D. -> 2.5
Question 37. If ΔG (free energy change) for a chemical reaction is very large and negative, then the reaction is
  1.    Not feasible
  2.    Just feasible
  3.    Very much feasible
  4.    Unpredictable as ΔG is no measure of feasibility of a reaction
 Discuss Question
Answer: Option C. -> Very much feasible
Question 38. Transition state theory relates the above quantities as
  1.    K ∝ e-E/RT
  2.    K ∝ T.eE/RT
  3.    K ∝ √T
  4.    K ∝ T1.5
 Discuss Question
Answer: Option B. -> K ∝ T.eE/RT
Question 39. Velocity of a chemical reaction
  1.    Decreases with increase in temperature
  2.    Increases with increase of pressure of reactants for all reactions
  3.    Decreases with increase of reactant concentration
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 40. Which of the following will favour the reverse reaction in a chemical equilibrium reaction?
  1.    Increasing the concentration of one of the reactants
  2.    Increasing the concentration of one or more of the products
  3.    Removal of at least one of the products at regular interval
  4.    None of these
 Discuss Question
Answer: Option B. -> Increasing the concentration of one or more of the products

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