chemical engineering thermodynamics for chemical chemical engineering MCQs – Page 25

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 Review each marked answer and report any item that may be outdated or unclear.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
481. In the reaction, represented by, 2SO2 + O2 ? 2SO3; ?H = 42 kcal; the forward reaction will be favoured by____________________?
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A. Low temperature

B. High pressure

C. Both A. and B

D. Neither A. nor B

482. The unity of Plancks constant h in the equation, E = hv is____________________?
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A. J/s

B. J.S

C. J/kmol

D. kmol/J

483. The temperature at which both liquid and gas phases are identical, is called the _____________ point?
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A. Critical

B. Freezing

C. Boiling

D. Triple

484. One ton of refrigeration is defined as the heat rate corresponding to melting of one ton of ice in one ________________?
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A. Second

B. Minute

C. Hour

D. Day
485. Heat pump_______________________?
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A. Accomplishes only space heating in winter

B. Accomplishes only space cooling in summer

C. Accomplishes both A. and B

D. Works on Carnot cycle

486. With increase in temperature, the internal energy of a substance___________________?
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A. Remains unchanged

B. Decreases

C. May increase or decrease; depends on the substance

D. Increases
487. The internal energy of a gas obeying P (V b) RT (where, b is a positive constant and has a constant Cv), depends upon its________________?
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A. All A, B. & C

B. Volume

C. Pressure

D. Temperature
488. Clausius-Clapeyron equation is applicable to _____________ equilibrium processes?
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A. All A, B. and C

B. Solid-vapor

C. Liquid-vapor

D. Solid-liquid

489. Maxwells relation corresponding to the identity, dH = dS = Vdp + ??i dni is_____________________?
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A. (?T/?V)S, ni = -(?P/?S)V, ni

B. (?T/?P)S, ni = (?V/?S)P, ni

C. (?S/?V)T, ni = (?P/?T)V, ni

D. (?S/?P)T, ni = (?V/?T)P, ni

490. For a single component two phase mixture, the number of independent variable properties are_________________?
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A. One

B. Zero

C. Two

D. Three

491. Pick out the wrong statement ?
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B. An ideal liquid or solid solution is defined as one in which each component obeys Raoults

C. If Raoults law is applied to one component of a binary mixture; Henrys law or Raoults law is

D. None of these

E. lied to the other component also

F. Henrys law is rigorously correct in the limit of infinite dilution

492. Work done is a____________________?
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A. Path function

B. Point function

C. State description of a system

D. Property of the system

493. Refrigeration capacity of a household refrigerator may be round about _____________ tons?
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A. 0.15

B. 6.5

C. 4.5

D. 1.5

494. Enthalpy H is defined as___________________?
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A. None of these

B. H E = PV

C. H = E PV

D. H = F TS

495. When a gas in a vessel expands, its internal energy decreases. The process involved is________________?
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A. Irreversible

B. Adiabatic

C. Isothermal

D. Reversible
496. The thermodynamic law, PVy = constant, is not applicable in case of______________?
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A. Free expansion of an ideal gas

B. Adiabatic expansion of steam in a turbine

C. Ideal compression of air

D. Adiabatic compression of a perfect gas

497. Specific heat of a gas for a reversible adiabatic process is________________?
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A. Infinity

B. None of these

C. Negative

D. Zero
498. Pick out the wrong statement?
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A. Cp of monatomic gases such as metallic vapor is about 5 kcal/kg.atom

B. At absolute zero temperature, the heat capacity for many pure crystalline substances is zero

C. The heat capacity of solid inorganic substance is exactly equal to the heat capacity of the

D. stance in the molten state</strong>

E. There is an increase in entropy, when a spontaneous change occurs in an isolated system

499. When liquid and vapour phase of multi-component system are in equilibrium (at a given temperature and pressure), then chemical potential of each component is___________________?
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A. Same in both the phases

B. Zero in both the phases

C. More in vapour phase

D. More in liquid phase

500. Co-efficient of performance for a reversed Carnot cycle working between temperatures T1 and T2 (T1 > T2) is ___________________?
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A. T1/(T1 T2)

B. (T1 T2)/T2

C. (T1 T2)/T1

D. T2/(T1 T2)