Chemical Engineering MCQs

Page No. 77

Entropy change for an irreversible process taking system and surrounding together is___________________?


a0


b> 0


c < 0


d None of these


View Answer > 0

Third law of thermodynamics is helpful in___________________?


a Prediction of the extent of a chemical reaction


b Calculating absolute entropies of substances at different temperature


cEvaluating entropy changes of chemical reaction


dBoth B. and C.


View Answer Both B. and C.

The internal energy of an ideal gas is a function of its _____________ only?


aMolecular size


b Volume


cPressure


dTemperature


View Answer Temperature

“The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture”. This is__________________?


aThe statement as per Gibbs-Helmholtz


bCalled Lewis-Randall rule


cHenry’s law


dNone of these



If two gases have same reduced temperature and reduced pressure, then they will have the same____________________?


aVolume


bMass


cCritical temperature


dNone of these


View Answer None of these

Forward reaction will be favoured for the exothermic reaction, represented by CO + H2O ⇌ CO2 + H2, by_________________?


a Low temperature and high pressure


bLow temperature and low pressure


c High temperature and high pressure


dHigh temperature and low pressure



For equilibrium process (i.e. reversible) in an isolated system __________________?


ads = 0


bds 0


cNone of these


d ds = Constant


View Answer ds = 0

Which of the following crystal structures characterises the austenitic stainless steel ?


aSimple hexagonal


bBody centred cubic


cFace centred cubic


dNone of these


View Answer Face centred cubic

The purpose of nitriding the steel is to___________________?


aHarden its surface


bSoften its surface


cImprove its reliability


dNone of these


View Answer None of these

Maximum consumption of zinc is in____________________?


aAlloying


bGalvanising


cUtensil manufacture


dElectrical industry


View Answer Galvanising

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