Multistage operation (as in the case of catalytic oxidation of SO) is not carried out for NH synthesis, because of

comparatively higher pressure drop.

high cost of the high pressure vessel used for the reactor.

chances of entrainment and disturbance of catalyst bed.

Multistage operation (as in the case of catalytic oxidation of SO) is

1.	Multistage operation (as in the case of catalytic oxidation of SO) is not carried out for NH synthesis, because of
A.	comparatively higher pressure drop.
B.	high cost of the high pressure vessel used for the reactor.
C.	higher pumping cost.
D.	chances of entrainment and disturbance of catalyst bed.
Answer» C. higher pumping cost.