Mass Transfer
The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the

Differential heat of adsorption
None of these
Heat of wetting
Integral heat of adsorption

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
Molecular diffusion is caused by the

Transfer of molecules from low concentration to high concentration region
Activation energy of the molecules
Thermal energy of the molecules
Potential energy of the molecules

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state,

Reboiler load and condenser load are minimum
The top and bottom compositions correspond to the maximum enrichment available
The top and bottom compositions are unchanged with and without total reflux
Composition of vapors and that of liquid do not vary throughout the column

ANSWER DOWNLOAD EXAMIANS APP