Chemical Engineering MCQs

Page No. 76

Which of the following is not a reversible process ?


aExpansion of an ideal gas against constant pressure

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bAtmospheric pressure vaporisation of water at 100°C

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c Solution of NaCl in water at 50°C

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d None of these

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Equilibrium constant of a reaction varies with the____________________?


aInitial concentration of the reactant

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bPressure

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cTemperature

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dNone of these

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View Answer Temperature

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


a Always exists

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bMay exist

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cNever exists

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dIs difficult to predict

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View Answer Always exists

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


aDecrease in temperature

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bIncrease in temperature

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cNo change in temperature

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dChange in temperature which is a function of composition

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


a Internal energy

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b Enthalpy

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cEntropy

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

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View Answer Enthalpy

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


a0

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b ∞

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c+ ve

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d– ve

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View Answer – ve

Compressibility factor of a gas is___________________?


aNot a function of its pressure

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bNot a function of its nature

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cNot a function of its temperature

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dUnity, if it follows PV = nRT

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


aIn which there is a temperature drop

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bWhich is exemplified by a non-steady flow expansion

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cWhich can be performed in a pipe with a constriction

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d In which there is an increase in temperature

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“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

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bKopp’s rule

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cLaw of corresponding state

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dArrhenius hypothesis

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____________ explains the equilibrium constant for any chemical reaction?


aHenry’s law

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bLaw of mass action

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cHess’s law

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dNone of these

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View Answer Law of mass action

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