Mass Transfer

A. Azeotropic mixture is to be separated and the final product is miscible with water
B. Liquids decompose, if distilled directly at atmospheric pressure
C. Material cannot be distilled by indirect heating even under low pressure, because of the high
boiling temperature
D. Material to be distilled is thermally unstable or has the tendency to react with other
components associated with it, at the boiling temperature

A. Partial condenser
B. Total condenser
C. Reboiler
D. Both B. and C

A. Decrease in air temperature
B. Increase in air humidity
C. Both A. and B.
D. Neither A. nor B.

A. Height < 6
B. Diameter < 0.6
C. Both A. & B.
D. Neither A. nor B.

A. Solids are drained to the same extent
B. Ratio of the insoluble to solution is constant
C. Both A. & B.
D. Neither A. nor B.

A. μ
B. 1/μ
C. √μ
D. μ2

A. High evaporation losses of water
B. High pressure drop of the gas
C. Difficulty in its fabrication
D. None of these

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

A. Temperature at constant humidity
B. Humidity at constant temperature
C. Both A. and B.
D. Neither A. nor B.

A. Using higher reflux ratio
B. Use of increased tray spacing
C. Increasing the liquid flow rate
D. Increasing the vapour flow rate