The partial pressure of each constituent present in an alloy is __________ the total vapor pressure exerted by the alloy.

A vapor whose partial pressure is less than its equilibrium vapor pressure is called a __________ vapor.

A

Saturated

B

Supersaturated

C

Superheated

D

None of these

A vapor whose partial pressure is less than its equilibrium vapor pressure is called the __________ vapor.

A

Saturated

B

Superheated

C

Unsaturated

D

Dry gaseous

The percentage ratio of the partial pressure of the vapor to the vapor pressure of the liquid at the existing temperature is

A

Termed as relative saturation

B

Not a function of the composition of gas mixture

C

Called percentage saturation

D

Not a function of the nature of vapor

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

A

Bubble point

B

Saturation temperature

C

Dew point

D

Both B and C

The total pressure exerted by the mixture of air and water vapour is equal to the sum of pressures which each constituent would exert, if it occupied the same space by itself. This statement is called

A

Kinetic theory of gases

B

Newton's law of gases

C

Dalton's law of partial pressures

D

Avogadro's hypothesis

The pressure under which liquid and vapor can co-exit at equilibrium is called the __________ vapor pressure.

A

Limiting

B

Real

C

Saturated

D

Normal

At a fixed pressure, the humidity depends upon the partial pressure of vapor in the mixture. Humidity of a vapour free gas is __________ percent.

A

100

B

0

C

50

D

Between 0 and 100

If air (a non-condensing gas) is present in a condensing vapor stream, it will __________ the condensation rate of vapor.

A

Increase

B

Decrease

C

Not affect

D

Increase the condensing film co-efficient as well as

According to Raoult's law, "The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component." Raoult's law is not applicable under the following assumption/condition.

A

No component is concentrated at the surface of the solution

B

The component molecules are non polar and are of almost equal size

C

In the formation of solution, chemical combination/molecular association between unlike molecules takes place

D

The attractive forces between like and unlike molecules are almost equal

Raoult's law states that 'the equilibrium vapor pressure that is exerted by a component in a solution is proportional to the mole fraction of that component'. This generalisation is based on the assumption that the

A

Sizes of the component molecules are approximately equal

B

Attractive forces between like and unlike molecules are approximately equal

C

Component molecules are non-polar and no chemical combination or molecular association between unlike molecules takes place in the formation of the solution

D

All of the above

The partial pressure of each constituent present in an alloy is __________ the total vapor pressure exerted by the alloy.

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