Question: The knowledge of initial concentration and rate constant is necessary to determine the half life time of a reaction of __________ order.
D.None of these
Answer: Option C

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Question 1. The irreversible reaction, X → Y, is the special case of the reversible reaction, X ⇋ Y, in which the
  1.    Equilibrium constant is infinite
  2.    Fractional conversion of
  3.    Concentration of
  4.    All of the above
Answer: Option D
Question 2. Photo-chemical reactions occur in presence of
  1.    Sunlight
  2.    Darkness
  3.    Solid catalysts
  4.    Monochromatic radiation only
Answer: Option A
Question 3. In an ideal mixed reactor (at steady state), the
  1.    Space time is equivalent to holding time for constant density systems
  2.    Composition throughout the reactor remains same
  3.    Exit stream has the same composition as the fluid within the reactor
  4.    All of the above
Answer: Option D
Question 4. The rate of the heterogenous catalytic reaction A(g) + B(g) ? C(g) is given by -rA = k.KA.pA.PB/(1 + KA.PA + Kc.pc), where KA and Kc are the adsorption equilibrium constants. The rate controlling step for this reaction isA. absorption of A.
  1.    Absorption of A
  2.    Surface reaction between absorbed A and absorbed B
  3.    Surface reaction between absorbed A and B in the gas phase
  4.    Surface reaction between A in the gas phase and absorbed B
Answer: Option C
Question 5. With increase in initial concentration, the fractional conversion of a first order reaction in a given time
  1.    Increases
  2.    Decreases
  3.    Remains constant
  4.    Unpredictable
Answer: Option C
Question 6. Pick out the wrong statement:
  1.    Chemical reactions with high activation energy are very temperature sensitive
  2.    A flat velocity profile exists in a plug flow reactor
  3.    The residence time for all the elements of fluid in case of a P.F.R. need not be same
  4.    Half life of a reaction increases with increased initial concentration for reaction orders more than one
Answer: Option C

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