Chemical Engineering MCQs

Page No. 76

Which of the following is not a reversible process ?


aExpansion of an ideal gas against constant pressure


bAtmospheric pressure vaporisation of water at 100°C


c Solution of NaCl in water at 50°C


d None of these



Equilibrium constant of a reaction varies with the____________________?


aInitial concentration of the reactant


bPressure


cTemperature


dNone of these


View Answer Temperature

For a cyclic process, a fixed ratio between heat and work___________________?


a Always exists


bMay exist


cNever exists


dIs difficult to predict


View Answer Always exists

When dilute aqueous solutions of two salts are mixed, the process is associated with ___________________?


aDecrease in temperature


bIncrease in temperature


cNo change in temperature


dChange in temperature which is a function of composition



For an incompressible fluid, the _______________ is a function of both pressure as well as temperature?


a Internal energy


b Enthalpy


cEntropy


d All (A), B. & (C)


View Answer Enthalpy

Gibbs free energy of mixing at constant pressure and temperature is always__________________?


a0


b


c+ ve


d– ve


View Answer – ve

Compressibility factor of a gas is___________________?


aNot a function of its pressure


bNot a function of its nature


cNot a function of its temperature


dUnity, if it follows PV = nRT



The adiabatic throttling process of a perfect gas is one of constant enthalpy_________________?


aIn which there is a temperature drop


bWhich is exemplified by a non-steady flow expansion


cWhich can be performed in a pipe with a constriction


d In which there is an increase in temperature



“When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change.” This is called the_______________?


aLe-Chatelier principle


bKopp’s rule


cLaw of corresponding state


dArrhenius hypothesis



____________ explains the equilibrium constant for any chemical reaction?


aHenry’s law


bLaw of mass action


cHess’s law


dNone of these


View Answer Law of mass action

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