In a gas-liquid absorption column, for obtaining the maximum absorption efficiency___________________?

Related Mcqs:

1. In a gas-liquid absorption column, 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
   Answer: Option C

2. With increase in the liquid flow rate at a fixed gas velocity in a randomly packed counter current gas-liquid absorption column, the gas pressure drop___________________?

   A. Decreases
   B. Remains unchanged
   C. Increases
   D. Decreases exponentially

3. For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG: mass transfer co-efficient, moles/m2, a: interfacial area per unit volume of tower) ?

   A. G/(FG . a)
   B. FG/(G . a)
   C. (G . a)/FG
   D. L/(FG . G)

4. 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 A., B. and C.

5. Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 × 10-3 kg mole/m2.s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m2 .s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01 respectively is _________________________?

   A. 5.6 × 10-4
   B. 8.5 × 10-4
   C. 5.6 × 10-3
   D. 8.5 × 10-3

6. ______________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction ?

   A. Packed
   B. Bubble
   C. Spray
   D. Tray

7. Absorption factor, for a fixed degree of absorption from a fixed amount of gas should be_________________?

   A. 1
   B. > 1
   C. < 1
   D. ≤ 1

8. _______________ column is used in gas absorption process ?

   A. Wetted wall
   B. Sieve/perforated tray
   C. Bubble cap
   D. Packed

9. To get high tray efficiency___________________?

   A. Interfacial surface between liquid and gas phase should be large
   B. Time of contact between the two phases should be less
   C. Gas velocity should be very low
   D. Liquid entrainment should be severe

10. To get high tray efficiency___________________?

    A. Interfacial surface between liquid and gas phase should be large
    B. Time of contact between the two phases should be less
    C. Gas velocity should be very low
    D. Liquid entrainment should be severe