Mass Transfer

Question: __________ is concerned with the adsorption equilibria.
[A].

Fick’s law

[B].

Gibb’s equation

[C].

Freundlich equation

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: A minimum boiling azeotrope is exemplified by
[A].

toluene-benzene

[B].

acetone-carbon disulphide

[C].

water-isobutyl alcohol

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: During constant rate drying period, vaporisation rate per unit drying surface area
[A].

decreases with time.

[B].

increases with time.

[C].

does not change with time,

[D].

does not affect the moisture content of the wet solid.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Bound moisture is that liquid which exerts an equilibrium vapor pressure __________ that of the pure liquid at the given temperature.
[A].

less than

[B].

more than

[C].

equal to

[D].

either (o) or (b); depends on the solid

Answer: Option A

Explanation:

No answer description available for this question.

Question: __________ is the temperature at which a gas-vapor mixture becomes saturated, when cooled at constant total pressure out of contact with a liquid.
[A].

Dew point

[B].

Bubble point

[C].

Dry bulb temperature

[D].

Wet bulb temperature

Answer: Option A

Explanation:

No answer description available for this question.

Question: If a two phase system is in physical equilibrium; then it means that, the
[A].

escaping tendency of each component from the liquid phase to the vapor phase is exactly equal to that from vapor phase to liquid phase.

[B].

temperature of the liquid phase is equal to that of the vapor phase.

[C].

total pressure throughout the liquid phase is equal to that throughout the vapor phase.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the
[A].

latent heat

[B].

humid heat

[C].

specific heat

[D].

sensible heat

Answer: Option C

Explanation:

No answer description available for this question.

Question: __________ temperature is the steady state temperature attained by a small amount of liquid evaporating into a large quantity of unsaturated gas-vapor mixture.
[A].

Dry bulb

[B].

Wet bulb

[C].

Dew point

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: In saturated gas, the
[A].

vapour is in equilibrium with the liquid at the gas temperature.

[B].

vapour is in equilibrium with the liquid at the room temperature.

[C].

partial pressure of vapour equals the vapour pressure of the liquid at room temperature.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.
[A].

greater than

[B].

smaller than

[C].

equal to

[D].

either (a), or (b) ; depends on the type of packing

Answer: Option B

Explanation:

No answer description available for this question.