Mass Transfer
For a binary mixture distillation process, the degree of freedom is 2. However, if the pressure is fixed in this process, the number of independent variables in this process will be

Mass Transfer
Use of raschig rings in place of crushed stones as packing in packed beds (other things being same)

Increases pressure drop, decreases surface area
Increases pressure drop, increases surface area
Decreases pressure drop, increases surface area
Decreases pressure drop, decreases surface area

ANSWER DOWNLOAD EXAMIANS APP