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MCQs

Total Questions : 2307 | Page 10 of 231 pages
Question 91. In case of a/an __________ chemical reaction, conversion increases with the rise in temperature.
  1.    Reversible exothermic
  2.    Irreversible exothermic
  3.    Irreversible endothermic
  4.    Reversible endothermic
 Discuss Question
Answer: Option D. -> Reversible endothermic
Question 92. Pick out the wrong statement.
  1.    Catalytic activity of enzyme catalysed reactions which is affected by temperature, pH value & chemical agents, is maximum at a temperature of about 45°C
  2.    Most of the enzyme catalysed reactions involve at least two substrates
  3.    Enzymes help in increasing the activation energy of the reaction
  4.    Equilibrium concentrations in enzyme catalysed reactions can be calculated by using the thermodynamic properties of substrates & products
 Discuss Question
Answer: Option C. -> Enzymes help in increasing the activation energy of the reaction
Question 93. The units of frequency factor in Arhenious equation
  1.    Are the same as those of the rate constant
  2.    Depend on the order of the reaction
  3.    Depend on temperature, pressure etc. of the reaction
  4.    Are cycles per unit time
 Discuss Question
Answer: Option A. -> Are the same as those of the rate constant
Question 94. Differential method for analysing the kinetic data is used
  1.    For testing complicated mechanisms
  2.    When the data are scattered
  3.    When rate expressions are very simple
  4.    None of these
 Discuss Question
Answer: Option A. -> For testing complicated mechanisms
Question 95. Integral method for analysing the kinetic data is used
  1.    When the data are scattered
  2.    For testing specific mechanisms with simple rate expressions
  3.    Both A and B
  4.    None of these
 Discuss Question
Answer: Option C. -> Both A and B
Question 96. In a/an __________ reactor, there is exchange of heat with the surroundings with sizeable temperature variation.
  1.    Adiabatic
  2.    Isothermal
  3.    Non-adiabatic
  4.    None of these
 Discuss Question
Answer: Option C. -> Non-adiabatic
Question 97. Reactant and product streams). The amount of heat to be removed is
  1.    2/3 kW
  2.    1kW
  3.    5/3 kW
  4.    4kW
 Discuss Question
Answer: Option C. -> 5/3 kW
Question 98. In an exothermic reaction, the energy of the reacting substances as compared to that of products is
  1.    More
  2.    Less
  3.    Same
  4.    Either A or B, depends on order of reaction
 Discuss Question
Answer: Option A. -> More
Question 99. Reaction rate of a first order reaction, which is half completed in 23 minutes will be
  1.    0.03 sec⁻¹
  2.    0.03 min⁻¹
  3.    0.03 hr⁻¹
  4.    0.05 min⁻¹
 Discuss Question
Answer: Option B. -> 0.03 min⁻¹
Question 100. The effect of increasing pressure on the gaseous equilibrium of the reaction 2X+3Y ⇋ 3X+2Y indicates that
  1.    Pressure has no effect
  2.    Backward reaction is favoured
  3.    Forward reaction is favoured
  4.    None of these
 Discuss Question
Answer: Option A. -> Pressure has no effect

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