Chemical Engineering MCQs

Page No. 202

Addition of a non-volatile solute to a pure solvent ____________________?


aIncreases its freezing point

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b Increases its boiling point

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cDecreases its freezing point

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dBoth B. and C.

✓


View Answer Both B. and C.

The temperature in isentropic flow_______________?


aDoes not depend on Mach number

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bDepends on Mach number only

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cCannot drop and then increase again downstream

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dNone of these

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If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its___________________?


aBubble point

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bSaturation temperature

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cDew point

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dBoth B. and C.

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View Answer Both B. and C.

Pipes having diameter 14 inches or more are designated by their_________________?


aOutside diameter

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bInside diameter

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cSchedule number

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dNone of these

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View Answer Outside diameter

Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are pv B and pv w respectively. The partial pressure of benzene in air-vapour mixture is_________________?


aPvB

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bxB.PvB

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c(Patm – Pvw)xB

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dxB.Patm

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View Answer xB.PvB

Speed of sound in an ideal gas depends on its________________?


aTemperature

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bPressure

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cSpecific volume

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dNone of these

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View Answer Temperature

1 torr is equal to ______________ mm Hg column?


a1

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b0.1

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c10

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d1000

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View Answer 1

For a given Reynold number as d/D for an orifice increases, Cd will (where, d & D are orifice & pipe diameters respectively)?


aIncrease

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bDecrease

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cRemain constant

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dEither A. or B.; depends on other factors

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View Answer Increase

The quantity of heat required to evaporate 1 kg of a saturated liquid is called __________________?


aSpecific heat

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b1 Kcal

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cSensible heat

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dLatent heat

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View Answer Latent heat

Unrestrained expansion of an ideal gas does not result in its cooling due to the reason that the gas molecules ____________________?


aDo not lose energy on collision

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bAre above the inversion temperature

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cDo not exert attractive force on each other

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dDo work equal to loss in kinetic energy

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