Chemical Engineering MCQs

Page No. 413

During a phase change process like sublimation, vaporisation, melting etc., the specific ____________ does not change?


aEnthalpy


bGibbs free energy


cInternal energy


dEntropy


View Answer Gibbs free energy

Enthalpy of a vapor gas mixture may be increased by increasing the________________?


aTemperature at constant humidity


bHumidity at constant temperature


cTemperature and the humidity


dAll A., B. & C.


View Answer All A., B. & C.

The vapor pressure of liquids (having similar chemical nature) at any specified temperature ______________ with increasing molecular weight?


aIncreases


bDecreases


cRemains unchanged


dIncreases linearly


View Answer Decreases

Sometimes, in chemical processes, a part of the outlet stream is rejected as waste in order to keep the impurity level in the system within limits. This phenomenon is termed as the_________________?


aRecycling


bRecycling


cBypassing


dRecirculation


View Answer Recycling

The average translational kinetic energy with which a gas molecule is endowed is dependent on its__________________?


aNature


bSize


cAbsolute temperature


dAll A., B. & C.


View Answer Absolute temperature

Heat of reaction is a function of the___________________?


aPressure


bTemperature


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

2 litres of nitrogen at N.T.P. weighs ______________ gms ?


a14


b2.5


c28


d1.25


View Answer 2.5

At what temperature, given mass of a gas that occupies a volume of 2 litres at N.T.P. will occupy a volume of 4 litres, if the pressure of the gas is kept constant ?


a273°C


b273°K


c100°C


d200°C


View Answer 273°C

The vapour pressure of a solution (made by dissolving a solute in a solvent) is ____________ that of the pure solvent?


aLess than


bMore than


cEqual to


dEither more or less; depends on the solvent


View Answer Less than

Boiling point of a non-homogeneous mixture of immiscible liquids is _____________ that of any one of its separate components?


aLower than


bHigher than


cEqual to


dEither A. or B.; depends on the liquids


View Answer Lower than

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