Mass Transfer
Agitator is provided in a crystalliser for

Crystal growth
Avoiding deposition on cooler surfaces
Formation of nuclei
All of these

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP