Mass Transfer

1. Molality is defined as the number of gm moles of solute per _________ of solvent.

  1. Litre
  2. gm
  3. Kg
  4. m3

Correct answer: (C)

2.'Absorption with chemical reaction' is involved in the removal of

  1. Carbon dioxide from gaseous stream using alkaline solution
  2. Benzol from coke oven gas using solar oil/wash oil
  3. Ammonia from coke oven gas using refrigerated water
  4. Tar from coke oven gas in primary gas coolers using chilled water

Correct answer: (A)
Carbon dioxide from gaseous stream using alkaline solution

3.'ADDUCTS' and 'CLATHRATES' are used in case of

  1. Extractive distillation
  2. Crystallisation
  3. All of above
  4. None of these

Correct answer: (B)

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

  1. Packed
  2. Bubble
  3. Spray
  4. Tray

Correct answer: (B)

5._________ column is the most suitable for achieving the best performance for mass transfer operations involving liquid with dispersed solids.

  1. Wetted wall
  2. Packed
  3. Plate
  4. Spray

Correct answer: (C)

6._________ column is used in gas absorption process.

  1. Wetted wall
  2. Sieve/perforated tray
  3. Bubble cap
  4. Packed

Correct answer: (D)

7._________ columns are used for liquid dispersion in a continuous gas phase.

  1. Packed
  2. Pulse
  3. Bubble cap
  4. Sieve plate

Correct answer: (A)

8._________ developed the film theory.

  1. Higbie
  2. Fick
  3. Ergun
  4. Levenspiel

Correct answer: (A)

9._________ diffusion is used for separating the isotopes of methane.

  1. Thermal
  2. Pressure
  3. Force
  4. None

Correct answer: (A)

10._________ equation applies to diffusivities in liquids.

  1. Gilliland
  2. Hirschfelder
  3. Wilke and Chang
  4. None of these

Correct answer: (A)

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