In continuous distillation, the internal reflux ratio (Ri) and the external reflux ratio (Re) are related as_____________________?

Byadmin February 18, 2019August 22, 2021

In continuous distillation, the internal reflux ratio (Ri) and the external reflux ratio (Re) are related as_____________________?

A. Ri = Re/(1 – Re)
B. Ri = (1 – Re)/Re
C. Ri = Re
D. Ri = Re/(1 + Re)

Mass Transfer

In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at ________________ reflux ?

In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripg and rectifying sections coincide with the diagonal at ________________ reflux ?

A. Total
B. Minimum
C. Operating
D. Maximum permissible

Read More In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at ________________ reflux ?
CHEMICAL ENGINEERING | Mass Transfer

As the reflux ratio decreases, the

Question: As the reflux ratio decreases, the
[A].

separation becomes more efficient.
[B].
number of plates increases.
[C].
column diameter increases.
[D].
none of these.

Answer: Option B

Explanation:

No answer description available for this question.

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Mass Transfer

Blowdown in a cooling tower____________________?

Blowdown in a cooling tower____________________?

A. Means discarding a small fraction of circulating water to prevent and limit the concentration
of salt and impurities
B. Increases the scale forming tendencies of water
C. Is undesirable
D. All A., B. & C.

Read More Blowdown in a cooling tower____________________?
CHEMICAL ENGINEERING | Mass Transfer

H2S present in naphtha reformed gas is removed by absorbing with

Question: H2S present in naphtha reformed gas is removed by absorbing with
[A].

ethanolamine
[B].
K2CO3
[C].
HCl
[D].
vacuum gas oil

Answer: Option A

Explanation:

No answer description available for this question.

Read More H2S present in naphtha reformed gas is removed by absorbing with
CHEMICAL ENGINEERING | Mass Transfer

Henry’s law states that the

Question: Henry’s law states that the
[A].

partial pressure of a component over a solution is proportional to its mole fraction in the liquid.
[B].
partial pressure of a component over a solution is proportional to the mole fraction in the vapour.
[C].
vapour pressure is equal to the product of the mole fraction and total pressure.
[D].
partial pressure is equal to the product of the mole fraction and total pressure.

Answer: Option A

Explanation:

No answer description available for this question.

Read More Henry’s law states that the
CHEMICAL ENGINEERING | Mass Transfer

As the reflux ratio in a distillation coloumn is increased from the minimum, the

Question: As the reflux ratio in a distillation coloumn is increased from the minimum, the
[A].

slope of the operating line in stripping section decreases.
[B].
number of plates decreases very slowly first and then more and more rapidly.
[C].
total cost first decreases and then increases.
[D].
liquid flow increases while the vapor flow decreases for a system.

Answer: Option C

Explanation:

No answer description available for this question.

Read More As the reflux ratio in a distillation coloumn is increased from the minimum, the

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