chemical engineering thermodynamics for chemical chemical engineering MCQs – Page 14

Practise multiple-choice questions from chemical engineering thermodynamics for chemical chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering thermodynamics for chemical chemical engineering Mcqs
261. A cylinder contains 640 gm of liquid oxygen. The volume occupied (in litres) by the oxygen, when it is released and brought to standard conditions (0C, 760 mm Hg) will be _____________ litres?
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A. Data insufficient; cant be computed

B. 448

C. 22.4

D. 224

262. In case of vapour compression refrigeration system, elevating the evaporator temperature (keeping the condenser temperature constant) results in_____________?
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A. No change in the value of COP

B. Enhanced COP

C. Decreased COP

D. Increased or decreased COP; depending upon the type of refrigerant

263. Pick out the wrong statement ?
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A. The gases which are capable of forming ions in aqueous solution are much more soluble in

B. At constant pressure, solubility of a gas in a liquid diminishes with rise in temperature

C. er than in other solvents

D. At constant pressure, solubility of a gas in a liquid increases with rise in temperature

E. Normally, the gases which are easily liquefied are more soluble in common solvents

264. What is the value of Joule-Thomson co-efficient for an ideal gas ?
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A. ?

B. #NAME?

C. 0

D. #NAME?

265. Melting of ice is an example of an _____________ process?
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A. Isometric

B. None of these

C. Isothermal

D. Adiabatic

266. As pressure approaches zero, the ratio of fugacity to pressure (f/P) for a gas approaches____________________?
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A. An indeterminate value

B. Infinity

C. Zero

D. Unity
267. Consider the reaction, C + O2 ? CO2; ?H = 94 kcal. What will be the value of ?H for the reaction CO2 ? C + O2 ?
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A. < -94 kcal

B. -94 kcal

C. +94 kcal

D. > 94 kcal

268. The work done in an adiabatic change in a particular gas depends upon changes in the ______________ only?
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A. Temperature

B. Pressure

C. Volume

D. Specific heat

269. At absolute zero temperature, the _____________ of the gas is zero?
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A. None of these

B. Volume

C. Mass

D. Pressure

270. The quantitative effect of temperature on chemical equilibrium is given by the____________________?
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A. Le-Chateliers principle

B. None of these

C. Arrhenius equation

D. Vant-Hoff equation
271. For a given substance at a specified temperature, activity is ______________ to fugacity?
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A. Equal

B. Inversely proportional

C. None of these

D. Directly proportional
272. Equilibrium constant decreases as the temperature___________________?
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A. Decreases, for an exothermic reaction

B. Increases, for an endothermic reaction

C. Increases, for an exothermic reaction

D. None of these

273. The main feature of Carnot refrigeration cycle is that, it________________________?
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A. Transfers heat from high temperature to low temperature

B. Accomplishes the reverse effect of the heat engine

C. None of these

D. Does not need the addition of external work for its functioning

274. No work is done by the system, when a reaction occurs at constant__________________?
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A. Volume

B. Temperature

C. None of these

D. Pressure

275. For a spontaneous process, free energy__________________?
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A. Is zero

B. Increases

C. Decreases whereas the entropy increases

D. And entropy both decrease

276. The unit of fugacity is the same as that of the_________________?
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A. Pressure

B. Volume

C. Molar concentration

D. Temperature

277. At the critical point of a substance____________?
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A. Liquid and vapour have the same density

B. There is no distinction between liquid and vapour phases

C. All A, B. and C

D. The surface tension vanishes

278. Heat is added at constant pressure in an ideal _____________ cycle?
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A. Stirling

B. Brayton

C. Rankine

D. Both B. and C
279. Which law of the thermodynamics provides basis for measuring the thermodynamic property ?
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A. Second law

B. Third law

C. First law

D. Zeroth law
280. Which of the following represents the Virial equation of state ?
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A. T = [RT/(V- b)] [a/?T. V(V + b)]

B. None of these

C. PV/RT = 1 + (B/V) + (C/V2) +

D. n1u2 + ?2?1 = 0