Chemical Engineering - Mass Transfer

6. 

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:

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7. 

Which of the following solutions will follow Raoult's law most closely ?

A. A solution of benzene, toluene and oxylene.
B. 35% solution of camphor in water.
C. 35% solution of NH3 in water.
D. A solution of polar organic compounds (not of homologs of a series).

Answer: Option A

Explanation:

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8. 

Use of raschig rings in place of crushed stones as packing in packed beds (other things being same)

A. increases pressure drop, increases surface area.
B. increases pressure drop, decreases surface area.
C. decreases pressure drop, increases surface area.
D. decreases pressure drop, decreases surface area.

Answer: Option C

Explanation:

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9. 

Critical humidity of a solid salt means the humidity

A. above which it will always become damp.
B. below which it will always stay dry.
C. both (a) and (b).
D. above Which it will always become dry and below which it will always stay damp.

Answer: Option C

Explanation:

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10. 

The assumption made in Elis method in distillation is that enthalpy concentration lines of vapor and liquid are

A. parallel
B. straight
C. both parallel and straight
D. neither parallel nor straight

Answer: Option C

Explanation:

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