Chemical Engineering MCQs

Page No. 127

The total change in the enthalpy of a system is independent of the _______________________?


aNumber of intermediate chemical reactions involved

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b Pressure and temperature

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cState of combination and aggregation in the beginning and at the end of the reaction

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dNone of these

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Which of the following behaves most closely like an ideal gas ?


aHe

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bN2

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cO2

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dH2

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View Answer He

For a multi-component system, the term chemical potential is equivalent to the ___________________?


aMolal concentration difference

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bMolar free energy

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cPartial molar free energy

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dMolar free energy change

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A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect ?


aVapor compression cycle using expansion valve

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b Air refrigeration cycle

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c Vapor compression cycle using expansion engine

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dCarnot refrigeration cycle

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Fugacity co-efficient of a substance is the ratio of its fugacity to__________________?


aMole fraction

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bActivity

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cPressure

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dActivity co-efficient

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View Answer Pressure

As the entropy of the universe is increasing, day by day, the work producing capacity of a heat engine is_________________?


aNot changed

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bDecreasing

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c Increasing

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dData sufficient, can’t be predicted

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View Answer Decreasing

The standard state of a gas (at a given temperature) is the state in which fugacity is equal to__________________?


aUnity

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bActivity

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c Both A. & B

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dNeither A. nor B

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View Answer Both A. & B

The following heat engine produces power of 100,000 kW. The heat engine operates between 800 K and 300 K. It has a thermal efficiency equal to 50% of that of the Carnot engine for the same temperature. The rate at which heat is absorbed from the hot reservoir is____________________?


a100,000 kW

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b160,000 kW

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c200,000 kW

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d320,000 kW

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View Answer 320,000 kW

Joule-Thomson experiment is__________________?


aIsobaric

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bAdiabatic

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c Isenthalpic

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dBoth B. & C.

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View Answer Both B. & C.

Degree of freedom of a system consisting of a gaseous mixture of H2 and NH3 will be_________________?


a 0

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b1

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c2

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d3

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View Answer 3

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