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MCQs

Total Questions : 2096 | Page 207 of 210 pages
Question 2061. The energy of activation of exothermic reaction is
  1.    Very large compared to that for en-dothermic reaction
  2.    Not possible to predict
  3.    Zero
  4.    Negative
 Discuss Question
Answer: Option B. -> Not possible to predict
Question 2062. The most important application of distribution law is in
  1.    Drying
  2.    Liquid extraction
  3.    Distillation
  4.    Evaporation
 Discuss Question
Answer: Option B. -> Liquid extraction
Question 2063. Cp of a gas at its critical temperature and pressure
  1.    Becomes infinity
  2.    Becomes zero
  3.    Equals 1 kcal/kmol °K
  4.    Equals 0.24 kcal/kmol °K
 Discuss Question
Answer: Option A. -> Becomes infinity
Question 2064. If the pressure on 100 c.c. of air is halved, then its volume (at the same temperature) would be __________ c.c.
  1.    200
  2.    100
  3.    50
  4.    205
 Discuss Question
Answer: Option A. -> 200
Question 2065. The gas law (PV = RT) is true for an __________ change.
  1.    Neither A nor B
  2.    Adiabatic
  3.    Both A & B
  4.    Isothermal
 Discuss Question
Answer: Option C. -> Both A & B
Question 2066. The equation Tds = dE - PdV applies to
  1.    Single phase fluid of constant composition
  2.    Both B and C
  3.    Single phase fluid of varying composition
  4.    Open as well as closed systems
 Discuss Question
Answer: Option B. -> Both B and C
Question 2067. In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respetively, the Carnot COP will be
  1.    0.168
  2.    6.2
  3.    Data insufficient, can't be found out
  4.    5.2
 Discuss Question
Answer: Option D. -> 5.2
Question 2068. The Carnot co-efficient of performance (COP) of a domestic air conditioner compared to a household refrigerator is
  1.    More
  2.    Dependent on climatic conditions
  3.    Same
  4.    Less
 Discuss Question
Answer: Option D. -> Less
Question 2069. The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.
  1.    Does not change in volume
  2.    Contracts
  3.    Expands
  4.    Either A, B or C
 Discuss Question
Answer: Option B. -> Contracts
Question 2070. Free energy change of mixing two liquid substances is a function of the
  1.    Quantities of the constituents only
  2.    Concentration of the constituents only
  3.    All of these
  4.    Temperature only
 Discuss Question
Answer: Option C. -> All of these

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