Iron is a suitable catalyst for the reaction of nitrogen with hydrogen to form ammonia
A can be oxidised easily.
B adsorbs reactant molecules.
C does not desorb product molecules easily.
D forms hydrogen bonds with the ammonia.
The only correct answer is B
A is not correct because it is not oxidised in the reaction.
C is not correct because products cannot be separated if they are not desorbed.
D is not correct because metals do not form hydrogen bonds