In liquid-liquid extraction, the number of phases at plait point is

Question: An aqueous solution of methanol is to be distilled in a tray column. High pressure steam is available as a source of heat. For a given reflux ratio and overhead composition, two options are being explored; (i) a reboiler is used and (ii) no reboiler is used but steam is fed directly to the bottom of the column. As compared to option (i), in option (ii)
[A].

less number of trays are required.

[B].

composition of the residue remains unchanged.

[C].

more number of trays are required but the residue composition remains unchanged.

[D].

more number of trays are required and the residue composition is more dilute in methanol.

Answer: Option A

Explanation:

No answer description available for this question.

Question: If f is defined as above, then which of the following applies to a feed at dew point ?
[A].

f = 1

[B].

f < 1

[C].

f > 1

[D].

0 < f < 1

Answer: Option A

Explanation:

No answer description available for this question.