chemical engineering thermodynamics for chemical chemical engineering MCQs – Page 11

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 Review each marked answer and report any item that may be outdated or unclear.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
201. As the entropy of the universe is increasing, day by day, the work producing capacity of a heat engine is_________________?
comments icon0

A. Increasing

B. Not changed

C. Data sufficient, cant be predicted

D. Decreasing
202. The equation, Cp Cv = R, is true for _______________ gas?
comments icon0

A. No

B. Any real

C. Only ideal

D. Both B. and C.

203. Entropy is a measure of the _____________ of a system?
comments icon0
A. Disorder

B. Orderly behaviour

C. Temperature changes only

D. None of these

204. Generation of heat by friction is an example of a/an ________________ change?
comments icon0
A. Irreversible

B. Adiabatic

C. Isothermal

D. Reversible

205. Vapour which is at a pressure smaller than the saturation pressure for the temperature involved is called a _____________ vapour?
comments icon0
A. Superheated

B. None of these

C. Desuperheated

D. Non-condensable

206. What is the degree of freedom for two miscible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope ?
comments icon0

A. 0

B. 1

C. 2

D. 3

207. PV? = Constant (where, ? = Cp/Cv) is valid for a/an ______________ process?
comments icon0

A. Isobaric

B. Isothermal

C. Adiabatic

D. Isentropic

208. First law of thermodynamics deals with the ___________________?
comments icon0

A. Irreversible processes only

B. Direction of energy transfer

C. Reversible processes only

D. None of these

209. The variation of heat of reaction with temperature at constant pressure is given by the ____________ law?
comments icon0

A. None of these

B. Antoines

C. Kelvins

D. Kirchoffs
210. Out of the following refrigeration cycles, which one has the minimum COP (Co-efficient of performance) ?
comments icon0

A. Carnot cycle

B. Ordinary vapour compression cycle

C. Vapour compression with a reversible expansion engine

D. Air cycle
211. The ratio of equilibrium constants (Kp2/Kp1) at two different temperatures is given by____________________?
comments icon0

A. (?H/R) (1/T2 1/T1)

B. (1/R) (1/T1 1/T2)

C. (R/?H) (1/T1 1/T2)

D. (?H/R) (1/T1 1/T2)
212. Variation of equilibrium pressure with temperature for any two phases of a given substances is given by the ____________ equation?
comments icon0

A. None of these

B. Gibbs-Duhem

C. Clapeyron

D. Maxwells

213. In the reaction, C + O2 ? CO2; ?H = 94 kcal. What is the heat content (enthalpy) of O2 ?
comments icon0

A. -94 kcal

B. > -94 kcal

C. Zero

D. < 94 kcal

214. High pressure steam is expanded adiabatically and reversibly through a well insulated turbine, which produces some shaft work. If the enthalpy change and entropy change across the turbine are represented by ?H and ?S respectively for this process ?
comments icon0

A. ? H = 0 and ?S = 0

B. ? H ? 0 and ?S = 0

C. ? H = 0 and ?S ? 0

D. ? H ? 0 and ?S ? 0

215. The chemical potential of a component (?i) of a phase is the amount by which its capacity for doing all work, barring work of expansion is increased per unit amount of substance added for an infinitesimal addition at constant temperature and pressure. It is given by_________________?
comments icon0

A. (?H/?ni)S, P, nj

B. (?G/?ni)T, P, nj = (?A/?ni) T, v, nj

C. All (A), B. and (C)

D. (?E/?ni)S, v, nj

216. In case of an _______________ process, the temperature of the system increases?
comments icon0

A. Adiabatic expansion

B. Isothermal expansion

C. Isothermal compression

D. Adiabatic compression
217. Joule-Thomson co-efficient which is defined as, ? = (?T/?P)H = 1/Cp (?H/?T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is ___________________?
comments icon0

A. #NAME?

B. 0

C. ?

D. #NAME?

218. Compressibility factor for almost all the gases are approximately same at the same__________________?
comments icon0
A. Reduced pressure and reduced temperature

B. Critical pressure and critical temperature

C. Pressure and temperature

D. None of these

219. In case of the decomposition of hydroiodic acid (2HI ? H2 + I2), addition of H2 (at equilibrium condition) will__________________?
comments icon0
A. Diminish the degree of dissociation of HI

B. Increase the partial pressure of I2

C. None of these

D. Decrease the partial pressure of HI

220. PVy = constant, holds good for an isentropic process, which is_________________?
comments icon0

A. Adiabatic and irreversible

B. Reversible and isothermal

C. Reversible and adiabatic

D. Isothermal and irreversible