A. Straight line
B. Slightly concave upward
C. Slightly concave downward
D. None of these
A. Lift and shower the solids thus exposing it thoroughly to the drying action of the gas
B. Reduce the residence time of solid
C. Increase the residence time of the solid
D. None of these
A. Diffusion
B. Bulk flow
C. Both A. & B.
D. Neither A. nor B.
A. Relative volatility is reasonably constant
B. Mixture (to be separated) shows negative deviation from ideality
C. Mixture (to be separated) shows positive deviation from ideality
D. Multi-component distillation is involved
A. Increases pressure drop, increases surface area
B. Increases pressure drop, decreases surface area
C. Decreases pressure drop, increases surface area
D. Decreases pressure drop, decreases surface area
A. 1
B. 1
D. ∞
A. Increasing the gas film co-efficient
B. Increasing the liquid film co-efficient
C. Increasing the total pressure
D. Decreasing the total pressure
A. 0.01
B. 0.1
C. 10-5 to 10-6
D. > 1
A. Transfer of molecules from low concentration to high concentration region
B. Thermal energy of the molecules
C. Activation energy of the molecules
D. Potential energy of the molecules
A. Newtonian liquids
B. Non-Newtonian liquids
C. Ideal gases
D. Real gases