Integrated Rate Equation and Half Lives MCQ

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• The order of the reaction, if the time of half-completion is changed from 50 sec to 25 sec, when the initial concentration is changed from 0.5 to 1M will be ___________
  ক

  0

  খ

  1

  গ

  2

  ঘ

  3
• The half life period of nth order reaction varies inversely to ____________ th power of the initial concentration of the reactants.
  ক

  n

  খ

  2n

  গ

  (n+1)

  ঘ

  (n-1)
• Which of the following is not an example of second order reaction?
  ক

  Oxidation of hydrogen bromide

  খ

  Saponification of ester

  গ

  Acid catalyzed hydrolysis of ester

  ঘ

  Gaseous decomposition of hydrogen iodide
• For a second order reaction, the rate is proportional to the square root of the concentration of the same reactant.
  ক

  True

  খ

  False
• The half life period of first order reaction is 15 min. Its rate constant will be equal to ___________
  ক

  0.0462 min-1

  খ

  0.462 min-1

  গ

  0.00462 min-1

  ঘ

  0.562 min-1
• In a first order reaction, the time required for the completion of 99% is _______ times the time required for the completion of half of the reaction.
  ক

  5

  খ

  10

  গ

  20

  ঘ

  50
• In a first order reaction, the time required for the completion of 99% is _______ for its 90% completion.
  ক

  Same

  খ

  Negligible

  গ

  Thrice

  ঘ

  Twice
• A compound decomposes according to the first order rate law with a half life period of 30 min. What will be the fraction of the remaining compound after 120 min?
  ক

  0.625

  খ

  0.0625

  গ

  0.25

  ঘ

  0.025
• The thermal decomposition of nitrogen pentaoxide in the gaseous phase is the example of ___________
  ক

  Zero order reaction

  খ

  Half order reaction

  গ

  First order reaction

  ঘ

  Second order reaction
• For a first order reaction, the half life period is independent of the ___________
  ক

  Initial concentration of the reactants

  খ

  Final concentration of the reactants

  গ

  Rate constant

  ঘ

  Concentration of products
• Which of the following is not an example of zero order reaction?
  ক

  Photochemical combination of hydrogen and chlorine

  খ

  Decomposition of ammonia over molybdenum surface

  গ

  Thermal decomposition of HI on gold surface

  ঘ

  Inversion of cane sugar in the presence of mineral acids
• The half-life period of zero order reaction is directly proportional to the ___________
  ক

  Rate constant

  খ

  Initial concentration of reactants

  গ

  Final concentration of reactants

  ঘ

  Concentration of products
• For a zero order reaction, the rate of reaction is independent of ___________
  ক

  Temperature

  খ

  Nature of reactants

  গ

  Concentration of reactants

  ঘ

  Effect of catalyst