Mass Transfer
The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving force. and, Kp = M.T.C. for diffusion of a gas through a stagnant inert gas with pressure as driving force.)

Kc = Kp = Km
Kc = Kp/RT = Km . RT/P
None of these
Kc = Kp . RT = Km . RT/p

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
Henry's law states that the

Vapour pressure is equal to the product of the mole fraction and total pressure
Partial pressure of a component over a solution is proportional to the mole fraction in the vapour
Partial pressure is equal to the product of the mole fraction and total pressure
Partial pressure of a component over a solution is proportional to its mole fraction in the liquid

ANSWER DOWNLOAD EXAMIANS APP