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MCQs

Total Questions : 2096 | Page 9 of 210 pages
Question 81. Chemical potential is a/an
  1.    Extensive property
  2.    Intensive property
  3.    Force which drives the chemical system to equilibrium
  4.    Both B and C
 Discuss Question
Answer: Option D. -> Both B and C
Question 82. For a real gas, the chemical potential is given by
  1.    RT dlnP
  2.    RT dlnf
  3.    R dlnf
  4.    None of these
 Discuss Question
Answer: Option B. -> RT dlnf
Question 83. For an ideal gas, the chemical potential is given by
  1.    RT dlnP
  2.    R dlnP
  3.    R dlnf
  4.    None of these
 Discuss Question
Answer: Option A. -> RT dlnP
Question 84. Boiling of liquid is accompanied with increase in the
  1.    Vapor pressure
  2.    Specific Gibbs free energy
  3.    Specific entropy
  4.    All of the above
 Discuss Question
Answer: Option A. -> Vapor pressure
Question 85. Law of corresponding states says that
  1.    , two different gases behave similarly, if their reduced properties (i.e. P, V and T) are same
  2.    The surface of separation (i. e. the meniscus) between liquid and vapour phase disappears at the critical temperature
  3.    No gas can be liquified above the critical temperature, howsoever high the pressure may be
  4.    The molar heat of energy of gas at constant volume should be nearly constant (about 3 calories)
 Discuss Question
Answer: Option A. -> , two different gases behave similarly, if their reduced properties (i.e. P, V and T) are same
Question 86. Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ____with the increase of reduced temperature.
  1.    Decreases
  2.    Increases
  3.    Remains constant
  4.    Decreases logarithmically
 Discuss Question
Answer: Option B. -> Increases
Question 87. Any substance above its critical temperature exists as
  1.    Saturated vapour
  2.    Solid
  3.    Gas
  4.    Liquid
 Discuss Question
Answer: Option C. -> Gas
Question 88. First law of thermodynamics is mathematically stated as
  1.    dQ = dE + dW
  2.    dQ = dE - dW
  3.    dE = dQ + dW
  4.    dW = dQ + dE
 Discuss Question
Answer: Option A. -> dQ = dE + dW
Question 89. A cyclic engine exchanges heat with two reservoirs maintained at 100 and 300°C respectively. The maximum work (in J) that can be obtained from 1000 J of heat extracted from the hot reservoir is
  1.    349
  2.    651
  3.    667
  4.    1000
 Discuss Question
Answer: Option A. -> 349
Question 90. Cv for an ideal gas
  1.    Does not depend upon temperature
  2.    Is independent of pressure only
  3.    Is independent of volume only
  4.    Is independent of both pressure and volume
 Discuss Question
Answer: Option D. -> Is independent of both pressure and volume

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