Stoichiometry - Chemical Engineering Questions and Answers

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Solutions having the same osmotic pressure are called __________ solutions.

dilute

ideal

isotonic

saturated

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One micron is equal to __________ cm.

10^-2

10^-4

10^-6

10^-8

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A vapor that exists above its critical temperature is termed as a __________ vapor.

saturated

unsaturated

gaseous

sub-cooled

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The crystallisation of a solute from a solution may be done by

removal of pure solvent by evaporation.

change of temperature thereby causing supersaturation.

changing the nature of the system by the addition of a more soluble material.

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

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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 ?

273°C

273°K

100°C

200°C

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1 kg/m² is equal to __________ mm water column.

100

1000

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An equation for calculating vapour pressure is given by, log₁₀ P = A - B(t + c). This is called the

Kistyakowsky equation

Antonic equation

Kopp's rule

Trouton's rule

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The value of the gas-law constant 'R' is 1.987

kcal/kg-mole.°C

Btu/lb-mole.°R

kcal/kg-mole.°K

both (b)& (c)

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Osmotic pressure of the solution can be increased by

decreasing its temperature.

increasing the volume of the vessel containing the solution.

diluting the solution.

none of these.