$34.$ The overall gas phase mass transfer coefficient is crucial for calculating:

$-$ A$)$ The solvent's boiling point.

$-$ B$)$ The rate of absorption in the column.

$-$ C$)$ The minimum solvent flow rate.

$-$ D$)$ The column's thermal efficiency.

$35.$ Designing for the condition in the gas film involves considering:

$-$ A$)$ The solubility of the gas in the solvent.

$-$ B$)$ The viscosity of the liquid phase.

$-$ C$)$ The resistance to mass transfer in the gas phase.

$-$ D$)$ The equilibrium concentration of the gas.

$36.$ The choice of solvent in a packed column affects the design by influencing:

$-$ A$)$ The HETP value and, consequently, the column efficiency.

$-$ B$)$ The gas phase mass transfer coefficient only.

$-$ C$)$ The required diameter of the packing material.

$-$ D$)$ The thermal conductivity of the system.

$37.$ An increase in the number of theoretical stages in an absorption column typically results in:

$-$ A$)$ A shorter column.

$-$ B$)$ A higher separation efficiency.

$-$ C$)$ Lower solvent costs.

$-$ D$)$ Increased pressure drop across the column.