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MCQs

Total Questions : 2096 | Page 26 of 210 pages
Question 251. Ideal refrigeration cycle is
  1.    Same as Carnot cycle
  2.    Same as reverse Carnot cycle
  3.    Dependent on the refrigerant's properties
  4.    The least efficient of all refrigeration processes
 Discuss Question
Answer: Option B. -> Same as reverse Carnot cycle
Question 252. The necessary and sufficient condition for equilibrium between two phases is
  1.    The concentration of each component should be same in the two phases
  2.    The temperature of each phase should be same
  3.    The pressure should be same in the two phases
  4.    The chemical potential of each component should be same in the two phases
 Discuss Question
Answer: Option D. -> The chemical potential of each component should be same in the two phases
Question 253. Specific volume of an ideal gas is
  1.    Equal to its density
  2.    The reciprocal of its density
  3.    Proportional to pressure
  4.    None of these
 Discuss Question
Answer: Option B. -> The reciprocal of its density
Question 254. In case of a reversible process (following pvn = constant), work obtained for trebling the volume (v₁ = 1 m³ and v₂ 3 m³ ) is max imum, when the value of 'n' is
  1.    0
  2.    1
  3.    1.44
  4.    1.66
 Discuss Question
Answer: Option A. -> 0
Question 255. In an adiabatic process, the
  1.    Heat transfer is zero
  2.    Temperature change is zero
  3.    Work done is a path function
  4.    Enthalpy remains constant
 Discuss Question
Answer: Option A. -> Heat transfer is zero
Question 256. Which of the following is not an extensive property?
  1.    Free energy
  2.    Entropy
  3.    Refractive index
  4.    None of these
 Discuss Question
Answer: Option C. -> Refractive index
Question 257. In an irreversible process
  1.    Tds = dE - dW = 0
  2.    DE - dW - Tds = 0
  3.    Tds - dE + dW< 0
  4.    Tds - dT + dW< 0
 Discuss Question
Answer: Option C. -> Tds - dE + dW< 0
Question 258. In any spontaneous process,
  1.    Only F decreases
  2.    Only A decreases
  3.    Both F and A decreases
  4.    Both F and A increase
 Discuss Question
Answer: Option C. -> Both F and A decreases
Question 259. The enthalpy change when ammonia gas is dissolved in water is called the heat of
  1.    Solution
  2.    Formation
  3.    Dilution
  4.    Combustion
 Discuss Question
Answer: Option A. -> Solution
Question 260. During adiabatic expansion of gas
  1.    Pressure remains constant
  2.    Pressure is increased
  3.    Temperature remains constant
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these

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