chemical engineering MCQs – Page 411

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 Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

8201. Reduced pressure of a gas is the ratio of its__________________?
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A. Critical pressure to pressure

B. Pseudocritical pressure to pressure

C. Pressure to pseudocritical pressure

D. Pressure to critical pressure

8202. A gas performs the maximum work, when it expands___________________?
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A. Isothermally

B. Isobarically

C. Adiabatically

D. Non-uniformly

8203. If two pure liquid constituents are mixed in any proportion to give an ideal solution, there is no change in____________________?
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A. Volume

B. Enthalpy

C. Both A. & B

D. Neither A. nor B

8204. An isolated system can exchange ______________ with its surroundings?
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A. Matter

B. Energy

C. Neither matter nor energy

D. Both matter and energy

8205. At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero. This follows from the __________________?
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A. Maxwells relations

B. Third law of thermodynamics

C. Second law of thermodynamics

D. Nernst heat theorem

8206. The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of _____________ and COP are the same?
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A. None of these

B. Kinematic viscosity

C. Work

D. Temperature

8207. For a cyclic process, a fixed ratio between heat and work___________________?
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A. Always exists

B. May exist

C. Never exists

D. Is difficult to predict

8208. For an isothermal reversible compression of an ideal gas_______________?
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A. dQ = dE

B. ?E = ?H = 0

C. Only ?E = 0

D. Only ?H =0

8209. Sublimation temperature of dry ice (solid CO2) is ____________ C?
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A. -78

B. 5

C. -273

D. 0

8210. Gibbs free energy (F) is defined as__________________?
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A. F = E TS

B. F = H + TS

C. F = H TS

D. F = E + TS

8211. In the equation PVn = constant, if the value of n = y = Cp/Cv, then it represents a reversible ______________ process?
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A. Adiabatic

B. Isentropic

C. Polytropic

D. Isothermal

8212. Gibbs phase rule finds application, when heat transfer occurs by___________________?
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A. Condensation

B. Radiation

C. Convection

D. Conduction

8213. Gibbs free energy of mixing at constant pressure and temperature is always__________________?
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A. 0

B. ?

C. ve

D. #NAME?

8214. Forward reaction will be favoured for the exothermic reaction, represented by CO + H2O ? CO2 + H2, by_________________?
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A. Low temperature and high pressure

B. High temperature and low pressure

C. Low temperature and low pressure

D. High temperature and high pressure

8215. Specific volume of an ideal gas is____________________?
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A. None of these

B. Equal to its density

C. Proportional to pressure

D. The reciprocal of its density

8216. The unit of fugacity is the same as that of the_________________?
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A. Pressure

B. Molar concentration

C. Volume

D. Temperature

8217. The equation, Cp Cv = R, is true for _______________ gas?
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A. No

B. Any real

C. Only ideal

D. Both B. and C.

8218. Helmholtz free energy A. is defined as____________________?
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A. A = H + TS

B. A = E TS

C. None of these

D. A = H TS

8219. Measurement of thermodynamic property of temperature is facilitated by ____________ law of thermodynamics?
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A. None of these

B. 3rd

C. 1st

D. Zeroth

8220. Clapeyron Equation deals with the____________________?
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A. Temperature dependence of heat of phase transition

B. Effect of an inert gas on vapour pressure

C. Rate of change of vapour pressure with temperature

D. Calculation of ?F for spontaneous phase change

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