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MCQs

Total Questions : 2307 | Page 1 of 231 pages
Question 1. A batch reactor is characterised by
  1.    Constant residence time
  2.    Variation in extent of reaction and properties of the reaction mixture with time
  3.    Variation in reactor volume
  4.    Very low conversion
 Discuss Question
Answer: Option B. -> Variation in extent of reaction and properties of the reaction mixture with time
Question 2. A catalyst inhibitor
  1.    Lessens its selectivity
  2.    May be useful for suppressing undesirable side reactions
  3.    Is added in small quantity during the catalyst manufacture itself
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 3. Rate of a chemical reaction is not influenced by the
  1.    Catalyst
  2.    Temperature
  3.    Reactants concentration
  4.    Number of molecules of reactants taking part in a reaction
 Discuss Question
Answer: Option D. -> Number of molecules of reactants taking part in a reaction
Question 4. In a continuous flow stirred tank reactor, the composition of the exit stream
  1.    Is same as that in the reactor
  2.    Is different than that in the reactor
  3.    Depends upon the flow rate of inlet stream
  4.    None of these
 Discuss Question
Answer: Option A. -> Is same as that in the reactor
Question 5. Exothermic reactions are best carried out in
  1.    A CSTR
  2.    CSTR in series
  3.    A plug flow reactor followed by CSTR
  4.    CSTR followed by a plug flow reactor
 Discuss Question
Answer: Option D. -> CSTR followed by a plug flow reactor
Question 6. A chemical reaction occurs, when the energy of the reacting molecules is __________ the activation energy of reaction.
  1.    Less than
  2.    Equal to
  3.    More than
  4.    Equal to or more than
 Discuss Question
Answer: Option D. -> Equal to or more than
Question 7. For nearly isothermal operation involving large reaction time in a liquid-phase reaction, the most suitable reactor is a __________ reactor.
  1.    Stirred tank
  2.    Tubular flow
  3.    Batch
  4.    Fixed bed
 Discuss Question
Answer: Option A. -> Stirred tank
Question 8. Slurry reactors are characterised by the
  1.    Lack of intraparticle diffusion resistance
  2.    Presence of two mobile phases
  3.    Both A and B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A and B
Question 9. Sulphuric acid is used as a catalyst in the
  1.    Hydrogenation of oils
  2.    Gas phase oxidation of SO₂ in chamber process
  3.    Alkylation of hydrocarbons
  4.    None of these
 Discuss Question
Answer: Option C. -> Alkylation of hydrocarbons
Question 10. The half life period of a first order reaction is
  1.    Always the same irrespective of the reaction
  2.    Dependent on initial concentration of the reactants
  3.    Proportional to the initial concentration of reactants
  4.    Half the specific rate constant
 Discuss Question
Answer: Option B. -> Dependent on initial concentration of the reactants

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