Mass Transfer - Study Mode

Show All Answers

[#591] Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 × 10 -3 kg mole/m 2 .s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m 2 .s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01 respectively is

(A) 5.6 × 10 -4

(B) 8.5 × 10 -4

(C) 5.6 × 10 -3

(D) 8.5 × 10 -3

Correct Answer

(B) 8.5 × 10 -4

[#592] Small dia distillation column can be a

(A) Packed column

(B) Sieve tray

(C) Bubble cap

(D) Any of these

Correct Answer

(A) Packed column

[#593] If R m is the minimum reflux ratio, the optimum reflux ratio may be around __________ R m .

(A) 1.2 to 1.5

(B) 2.5 to 3

(C) 3 to 4

(D) 5

Correct Answer

(A) 1.2 to 1.5

[#594] Which of the following is a suitable absorbent for removal of H 2 S from natural gas?

(A) Vetrocoke solution

(B) Monoethanol amine (MEA)

(C) Dilute

(D) Hot water

Correct Answer

(B) Monoethanol amine (MEA)

[#595] 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 NH 3 in water

(D) A solution of polar organic compounds (not of homologs of a series)

Correct Answer

(A) A solution of benzene, toluene and oxylene