Chemical Engineering MCQs

Page No. 72

Ideal gas law is applicable at____________________?


aLow T, low P

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b High T, high P

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cLow T, high P

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dHigh T, low P

✓


View Answer High T, low P

Work done in case of free expansion is____________________?


aIndeterminate

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bZero

✓


cNegative

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dNone of these

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View Answer Zero

When a gas is subjected to adiabatic expansion, it gets cooled due to__________________?


aDecrease in velocity

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bDecrease in temperature

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cDecrease in kinetic energy

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dEnergy spent in doing work

✓



A solid is transformed into vapour without going to the liquid phase at_________________?


aTriple point

✓


bBoiling point

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cBelow triple point

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d Always

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View Answer Triple point

A Carnot cycle consists of the following steps ?


aTwo isothermal and two isentropic

✓


b Two isobaric and two isothermal

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cTwo isochoric and two isobaric

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d Two isothermals and two isochoric

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“The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances”. This is the_________________?


aLewis-Randall rule

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b Statement of Van’t Hoff Equation

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cLe-Chatelier’s principle

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dNone of these

✓


View Answer None of these

Claude’s liquefaction process employs the cooling of gases by__________________?


aExpansion in an engine

✓


bFollowing a constant pressure cycle

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c Throttling

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dNone of these

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Cp – Cv = R is valid for ______________ gases?


a Ideal

✓


b Very high pressure

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cVery low temperature

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dAll of the above

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View Answer Ideal

Which of the following is Clausius-Clapeyron Equation for vaporisation of an ideal gas under the condition that the molar volume of liquid is negligible compared to that of the vapor ?


ad ln p/dt = Hvap/RT2

✓


bd ln p/dt = RT2/Hvap

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cdp/dt = RT2/Hvap

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ddp/dt = Hvap/RT2

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View Answer d ln p/dt = Hvap/RT2

Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is_____________________?


aPositive

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bNegative

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cZero

✓


dInfinity

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View Answer Zero

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