Stoichiometry - Chemical Engineering Questions and Answers

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The forces causing the vaporisation of liquid are derived from the Kinetic energy of translation of its molecules. The heat of vaporisation

increases with pressure rise.

decreases with increasing pressure.

becomes zero at the critical point.

both (b) & (c).

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Which of the following gravity scales is used exclusively for liquids heavier than water ?

Baumme scale

Twaddel scale

API scale

none of these

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For any system, the __________ heat of solution is dependent on the temperature and the adsorbate concentration.

integral

differential

both (a) & (b)

neither (a) nor (b)

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Weight of 56 litres of ammonia at N.T.P. is __________ gm.

2.5

42.5

2800

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Concentration of a solution expressed in terms of __________ is independent of temperature.

molarity

normality

molality

none of these

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

nature

size

absolute temperature

all (a), (b) & (c)

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The vapor pressure of a substance, at its melting point, is __________ in the solid state as compared to that in the liquid state.

less

same

either (a) or (b); depends on the nature of the substance

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Heat of __________ of a fuel is called its calorific value.

formation

combustion

reaction

vaporisation

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Recycling in a chemical process facilitates

increased yield

enrichment of product

heat conservation

all (a), (b) &(c)