Chemical Engineering MCQs

Page No. 413

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


aEnthalpy

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bGibbs free energy

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cInternal energy

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dEntropy

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View Answer Gibbs free energy

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


aTemperature at constant humidity

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bHumidity at constant temperature

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cTemperature and the humidity

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dAll A., B. & C.

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View Answer All A., B. & C.

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


aIncreases

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bDecreases

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cRemains unchanged

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dIncreases linearly

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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

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bRecycling

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cBypassing

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dRecirculation

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View Answer Recycling

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


aNature

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bSize

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cAbsolute temperature

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dAll A., B. & C.

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View Answer Absolute temperature

Heat of reaction is a function of the___________________?


aPressure

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bTemperature

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cBoth A. & B.

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dNeither A. nor B.

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View Answer Both A. & B.

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


a14

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b2.5

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c28

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d1.25

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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

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b273°K

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c100°C

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d200°C

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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

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bMore than

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cEqual to

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dEither more or less; depends on the solvent

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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

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bHigher than

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cEqual to

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dEither A. or B.; depends on the liquids

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View Answer Lower than

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