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MCQs

Total Questions : 2096 | Page 29 of 210 pages
Question 281. Joule-Thomson experiment is
  1.    Isobaric
  2.    Adiabatic
  3.    Isenthalpic
  4.    Both B & C
 Discuss Question
Answer: Option D. -> Both B & C
Question 282. If the internal energy of an ideal gas decreases by the same amount as the work done by the system, then the
  1.    Process must be isobaric
  2.    Temperature must decrease
  3.    Process must be adiabatic
  4.    Both B and C
 Discuss Question
Answer: Option D. -> Both B and C
Question 283. The point at which all the three (solid, liquid and gas) phases co-exist, is known as the __________ point.
  1.    Freezing
  2.    Triple
  3.    Boiling
  4.    Boyle
 Discuss Question
Answer: Option B. -> Triple
Question 284. Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor)?
  1.    Freon
  2.    Liquid sulphur dioxide
  3.    Methyl chloride
  4.    Ammonia
 Discuss Question
Answer: Option A. -> Freon
Question 285. Keeping the pressure constant, to double the volume of a given mass of an ideal gas at 27°C, the temperature should be raised to __________ °C.
  1.    270
  2.    327
  3.    300
  4.    540
 Discuss Question
Answer: Option B. -> 327
Question 286. Pick out the wrong statement.
  1.    A closed system does not permit exchange of mass with its surroundings but may permit exchange of energy
  2.    An open system permits exchange of both mass and energy with its surroundings
  3.    The term microstate is used to characterise an individual, whereas macro-state is used to designate a group of micro-states with common characteristics
  4.    None of the above
 Discuss Question
Answer: Option D. -> None of the above
Question 287. For an isothermal reversible compression of an ideal gas
  1.    Only ΔE = 0
  2.    Only ΔH =0
  3.    ΔE = ΔH = 0
  4.    DQ = dE
 Discuss Question
Answer: Option C. -> ΔE = ΔH = 0
Question 288. Which of the following identities can be most easily used to verify steam table data for superheated steam.
  1.    (∂T/∂V)S = (∂p/∂S)V
  2.    (∂T/∂P)S = (∂V/∂S)P
  3.    (∂P/∂T)V = (∂S/∂V)T
  4.    (∂V/∂T)P = -(∂S/∂P)T
 Discuss Question
Answer: Option D. -> (∂V/∂T)P = -(∂S/∂P)T
Question 289. Filling of gas from a high pressure cylinder into small bottles is an example of a/an __________ process.
  1.    Equilibrium
  2.    Adiabatic
  3.    Steady
  4.    Unsteady
 Discuss Question
Answer: Option D. -> Unsteady
Question 290. Charles' law for gases states that
  1.    V/T = Constant
  2.    V ∝ 1/T
  3.    V ∝ 1/P
  4.    PV/T = Constant
 Discuss Question
Answer: Option A. -> V/T = Constant

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