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MCQs

Total Questions : 2096 | Page 30 of 210 pages
Question 291. Boyle's law for gases states that
  1.    P ∝ 1/V, when temperature is constant
  2.    P ∝ 1/V, when temperature & mass of the gas remain constant
  3.    P ∝ V, at constant temperature & mass of the gas
  4.    P/V = constant, for any gas
 Discuss Question
Answer: Option B. -> P ∝ 1/V, when temperature & mass of the gas remain constant
Question 292. Which of the following is not an intensive property?
  1.    Volume
  2.    Density
  3.    Temperature
  4.    Pressure
 Discuss Question
Answer: Option A. -> Volume
Question 293. Pick out the wrong statement.
  1.    Phase rule variables are intensive properties
  2.    Heat and work are both state function
  3.    The work done by expansion of a gas in vacuum is zero
  4.    CP and CV are state function
 Discuss Question
Answer: Option B. -> Heat and work are both state function
Question 294. What is the number of degree of freedom for a system of two miscible non-reacting species in vapor-liquid equilibrium forming an azeotrope?
  1.    3
  2.    2
  3.    1
  4.    0
 Discuss Question
Answer: Option C. -> 1
Question 295. What is the degree of freedom for two mis-cible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope?
  1.    0
  2.    1
  3.    2
  4.    3
 Discuss Question
Answer: Option C. -> 2
Question 296. At __________ point, all the three phases (i.e.solid, liquid and gas) co-exist.
  1.    Eutcetic
  2.    Triple
  3.    Plait
  4.    Critical
 Discuss Question
Answer: Option B. -> Triple
Question 297. One ton of refrigeration is defined as the heat rate corresponding to melting of one ton of ice in one
  1.    Hour
  2.    Day
  3.    Minute
  4.    Second
 Discuss Question
Answer: Option B. -> Day
Question 298. Critical compressibility factor for all substances
  1.    Are more or less constant (vary from 0.2 to 0.3)
  2.    Vary as square of the absolute temperature
  3.    Vary as square of the absolute pressure
  4.    None of these
 Discuss Question
Answer: Option A. -> Are more or less constant (vary from 0.2 to 0.3)
Question 299. Enthalpy changes over a constant pressure path are always zero for __________ gas.
  1.    Any
  2.    A perfect
  3.    An easily liquefiable
  4.    A real
 Discuss Question
Answer: Option B. -> A perfect
Question 300. Thermal efficiency of a Carnot engine can approach 100%, only when the temperature of the
  1.    Cold reservoir approaches zero
  2.    Hot reservoir approaches infinity
  3.    Either A or B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Either A or B

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