Chemical Engineering MCQs

Page No. 77

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


a0

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b> 0

✓


c < 0

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d None of these

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View Answer > 0

Third law of thermodynamics is helpful in___________________?


a Prediction of the extent of a chemical reaction

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b Calculating absolute entropies of substances at different temperature

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cEvaluating entropy changes of chemical reaction

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dBoth B. and C.

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View Answer Both B. and C.

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


aMolecular size

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b Volume

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cPressure

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dTemperature

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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

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bCalled Lewis-Randall rule

✓


cHenry’s law

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dNone of these

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


aVolume

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bMass

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cCritical temperature

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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

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c High temperature and high pressure

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dHigh temperature and low pressure

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


ads = 0

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bds 0

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cNone of these

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d ds = Constant

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View Answer ds = 0

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


aSimple hexagonal

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bBody centred cubic

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cFace centred cubic

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dNone of these

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View Answer Face centred cubic

The purpose of nitriding the steel is to___________________?


aHarden its surface

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bSoften its surface

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cImprove its reliability

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dNone of these

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View Answer None of these

Maximum consumption of zinc is in____________________?


aAlloying

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bGalvanising

✓


cUtensil manufacture

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dElectrical industry

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View Answer Galvanising

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