Mass Transfer

A. Same as “Van der Waals” adsorption
B. Characterised by adsorption of heat
C. An irreversible phenomenon
D. A reversible phenomenon

A. L/mG
B. G/mL
C. mL/G
D. LG/m

A. Zero
B. Unity
C. Infinity
D. None of these

A. Constant molal overflow
B. Total reflux
C. Constant relative volatility
D. All A., B. and C.

A. Is of low volatility
B. Forms a low boiling azeotrope
C. Forms a high boiling azeotrope
D. Does not alter the relative volatility of the original components

A. Slope of the operating line in stripg 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

A. Evaporation
B. Blowdown
C. Entrainment
D. All A., B. & C.

A. Have low weight per unit volume
B. Have large surface area per unit volume
C. Have large free cross-section
D. Hold up large amount of liquid in the packing

A. Greater than that computed for ideality
B. Less than that computed for ideality
C. Less than the sum of the vapour pressure of the components
D. None of these

A. Stanton number
B. Peclet number
C. Thermal diffusivity
D. Momentum diffusivity