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


b Pressure and temperature


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


dNone of these



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


aHe


bN2


cO2


dH2


View Answer He

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


aMolal concentration difference


bMolar free energy


cPartial molar free energy


dMolar free energy change



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


b Air refrigeration cycle


c Vapor compression cycle using expansion engine


dCarnot refrigeration cycle



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


aMole fraction


bActivity


cPressure


dActivity co-efficient


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


bDecreasing


c Increasing


dData sufficient, can’t be predicted


View Answer Decreasing

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


aUnity


bActivity


c Both A. & B


dNeither A. nor B


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


b160,000 kW


c200,000 kW


d320,000 kW


View Answer 320,000 kW

Joule-Thomson experiment is__________________?


aIsobaric


bAdiabatic


c Isenthalpic


dBoth B. & C.


View Answer Both B. & C.

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


a 0


b1


c2


d3


View Answer 3

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