Chemical Engineering MCQs

Page No. 113

In case of a close thermodynamic system, there is ______________ across the boundaries?


aNo heat and mass transfer


b No mass transfer but heat transfer


c Mass and energy transfer


d None of these



Sherardizing process is used for__________________?


aSurface coating


bHeat treatment of high speed steel


cCold working on metals


dNone of these


View Answer Surface coating

Graphite is a good________________?


aThermal & electrical insulator


bConductor of heat


cConductor of electricity


dBoth B. & C.


View Answer Both B. & C.

______________ Equation predicts the activity co-efficient from experimental data ?


a Lewis-Randall


bMargules


cVan Laar


dBoth B. & C.


View Answer Both B. & C.

The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n- heptane and n- octane into pure compounds each at 1 atm is__________________?


a-2 RT ln 0.5


b-RT ln 0.5


c 0.5 RT


d2 RT


View Answer -RT ln 0.5

At normal boiling point, molar entropy of vaporisation is _____________ Joule/K°.mole?


a72


b 92


c142


d 192


View Answer 92

Iron rust is_________________?


aFerrous oxide


bHydrated ferric oxide


cPowdered iron


dFerric sulphide


View Answer Hydrated ferric oxide

A large iceberg melts at the base, but not at the top, because of the reason that_________________?


aIce at the base contains impurities which lowers its melting point


bDue to the high pressure at the base, its melting point reduces


cThe iceberg remains in a warmer condition at the base


dAll A, B. and C



Glass lined vessels are not used for handling/storing__________________?


aDilute H2SO4


bDilute HNO3


cDilute HCl


dHydrofluoric acid


View Answer Hydrofluoric acid

In an ideal gas mixture, fugacity of a species is equal to its___________________?


aVapor pressure


bPartial pressure


cChemical potential


d None of these


View Answer Partial pressure

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