Q1: Pressure drop through plate tower as compared to that through packed tower, for the same duty will be

ANS:B - more

The pressure drop through a plate tower, compared to that through a packed tower, for the same duty will generally be less. In a plate tower, gas and liquid flow through a series of plates or trays with openings or downcomers to allow liquid to pass through to the plate below. The liquid flows over the plates, creating a large interfacial area for mass transfer between the gas and liquid phases. In a packed tower, gas and liquid flow countercurrently through a bed of packing material. The packing material increases the contact area between the gas and liquid phases, enhancing mass transfer. While both plate and packed towers are used for gas-liquid contact operations such as absorption or distillation, the pressure drop through a plate tower is typically lower than that through a packed tower for the same duty. This is because in a plate tower, the flow paths are more defined and controlled, leading to lower fluid velocities and consequently lower pressure drop compared to the more chaotic flow through the packed bed. Therefore, in general, the pressure drop through a plate tower will be less than that through a packed tower for the same duty.