Chemical Engineering - Mass Transfer

6. 

Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as

A. KD
B. KD
C. KD1.5
D. KD2

Answer: Option B

Explanation:

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7. 

Desulphurisation of petrol is done in a

A. Bollman extractor
B. rotating disc extractor
C. packed extraction column
D. plate type extraction column

Answer: Option B

Explanation:

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8. 

Chemisorption compared to physical absorption has

A. lower adsorption rate.
B. lower capacity of the solvent for the solute gas.
C. increased utilisation of stagnant zones of the liquid phase.
D. none of these.

Answer: Option C

Explanation:

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9. 

Rate of adsorption increases as the

A. temperature increases.
B. temperature decreases.
C. pressure decreases.
D. size of adsorbent increases.

Answer: Option B

Explanation:

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10. 

Pick out the system with maximum boiling azeotrope at 1 atm.

A. acetone chloroform
B. ethyl alcohol-water
C. benzene-ethyl alcohol
D. none of these

Answer: Option A

Explanation:

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