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MCQs

Total Questions : 2096 | Page 203 of 210 pages
Question 2021. Fugacity of a component in an ideal gas mixture is euqal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at contant pressure and temperature __________ as its mole fraction increases.
  1.    Remains constant
  2.    Increases
  3.    Decreases exponentially
  4.    Decreases
 Discuss Question
Answer: Option B. -> Increases
Question 2022. When a gas is expanded from high pressure region to low pressure region ; temper -ature change occurs. This phenomenon is related to the
  1.    Third law of thermodynamics
  2.    Joule-Thomson effect
  3.    Gibbs-Duhem equation
  4.    Gibbs-Helmholtz equation
 Discuss Question
Answer: Option B. -> Joule-Thomson effect
Question 2023. The variation of heat of reaction with temperature at constant pressure is given by the __________ law.
  1.    Kirchoffs
  2.    Kelvin's
  3.    Antonie's
  4.    None of these
 Discuss Question
Answer: Option A. -> Kirchoffs
Question 2024. Internal energy is equal to the heat absorbed in case of a/an __________ process.
  1.    Adiabatic
  2.    Constant pressure
  3.    Polytropic
  4.    Constant volume
 Discuss Question
Answer: Option D. -> Constant volume
Question 2025. Fugacity co-efficient of a substance is the ratio of its fugacity to
  1.    Pressure
  2.    Activity
  3.    Mole fraction
  4.    Activity co-efficient
 Discuss Question
Answer: Option A. -> Pressure
Question 2026. The efficiency of an Otto engine compared to that of a diesel engine, for the same compression ratio will be
  1.    Data insufficient to predict
  2.    Less
  3.    More
  4.    Same
 Discuss Question
Answer: Option C. -> More
Question 2027. Out of the following refrigeration cycles, which one has maximum COP?
  1.    Air cycle
  2.    Carnot cycle
  3.    Ordinary vapor compression cycle
  4.    Vapor compression with a reversible expansion engine
 Discuss Question
Answer: Option B. -> Carnot cycle
Question 2028. While dissolving a gas into a liquid at a constant temperature, the ratio of the concentration of the gas in the solution phase and in the gaseous phase is
  1.    Infinity
  2.    Unity
  3.    Negative
  4.    Constant
 Discuss Question
Answer: Option D. -> Constant
Question 2029. A Carnot cycle consists of the following steps :
  1.    Two isobarics and two isothermals
  2.    Two isothermals and two isochorics
  3.    Two isothermals and two isentropics
  4.    Two isochorics and two isobarics
 Discuss Question
Answer: Option C. -> Two isothermals and two isentropics
Question 2030. The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition.
  1.    Internal energy
  2.    Gibbs free energy
  3.    Enthalpy
  4.    Helmholtz free energy
 Discuss Question
Answer: Option B. -> Gibbs free energy

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