Desirable value of absorption factor in an absorber is

Absorption factor, for a fixed degree of absorption from a fixed amount of gas should be

A

1

B

> 1

C

≤ 1

In a gas-liquid absorption coloumn, for obtaining the maximum absorption efficiency

A

Liquid stream should be distributed uniformly

B

Gas stream should be distributed uniformly

C

Both gas as well as liquid streams should be distributed uniformly

D

By passing should be completely avoided

Absorption accompanied with chemical reaction is exemplified by the absorption of

A

Ammonia in water

B

Benzol present in coke oven gas by wash oil

C

SO₂ in alkaline solution

D

All of the above

In the absorption of ammonia in water, the main resistance to absorption is by the __________ phase.

A

Liquid

B

Gas

C

Both A & B

D

Neither A nor B

Absorption (liquid-gas system) with evolution of heat as compared to isothermal absorption results in

A

Decreased solute solubility

B

Large minimum liquid to gas (L/G) ratio

C

Large number of trays

D

All of the above

In case of an absorber, the operating

A

Line always lies above the equilibrium curve

B

Line always lies below the equilibrium curve

C

Line can be either above or below the equilibrium curve

D

Velocity is more than the loading velocity

Which of the following acts as an insulator against heat, cold and as a shock-absorber in the body?

A

Dermis

B

Epidermis

C

Subcutaneous fat layer

D

None of the above

If G = insoluble gas in gas stream and L = non-volatile solvent in liquid stream, then the slope of the operating line for the absorber is

A

$$\frac{{\text{L}}}{{\text{G}}}$$

B

$$\frac{{\text{G}}}{{\text{L}}}$$

C

Always

D

None of these

For the same system, if the same liquid used in an absorber is decreased, the tower height will

A

Increase

B

Decrease

C

Remain unaffected

D

Decrease or increase ; depends on the type of liquid

For a single component absorber, the operating line is straight only when plotted in term of __________ units.

A

Partial pressure

B

Mole ratio

C

Mole fraction

D

None of these

Desirable value of absorption factor in an absorber is

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