Chemical Engineering MCQs

Page No. 113

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


aNo heat and mass transfer

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b No mass transfer but heat transfer

✓


c Mass and energy transfer

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d None of these

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Sherardizing process is used for__________________?


aSurface coating

✓


bHeat treatment of high speed steel

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cCold working on metals

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dNone of these

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View Answer Surface coating

Graphite is a good________________?


aThermal & electrical insulator

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bConductor of heat

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cConductor of electricity

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dBoth B. & C.

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View Answer Both B. & C.

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


a Lewis-Randall

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bMargules

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cVan Laar

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dBoth B. & C.

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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

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b-RT ln 0.5

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c 0.5 RT

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d2 RT

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View Answer -RT ln 0.5

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


a72

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b 92

✓


c142

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d 192

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View Answer 92

Iron rust is_________________?


aFerrous oxide

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bHydrated ferric oxide

✓


cPowdered iron

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dFerric sulphide

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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

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

✓


cThe iceberg remains in a warmer condition at the base

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dAll A, B. and C

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Glass lined vessels are not used for handling/storing__________________?


aDilute H2SO4

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bDilute HNO3

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cDilute HCl

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dHydrofluoric acid

✓


View Answer Hydrofluoric acid

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


aVapor pressure

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bPartial pressure

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cChemical potential

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d None of these

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View Answer Partial pressure

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