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NEET levelSingle correct optionDifficulty 1 of 3sc057

Which of the following is an example of homogeneous catalysis?

A $N X_{2} (g) + 3 H X_{2} (g) Fe (s) 2 NH X_{3} (g)$
B $2 SO X_{2} (g) + O X_{2} (g) NO (g) 2 SO X_{3} (g)$
C $2 SO X_{2} (g) + O X_{2} (g) V X_{2} O X_{5} (s) 2 SO X_{3} (g)$
D $C X_{2} H X_{4} (g) + H X_{2} (g) Ni (s) C X_{2} H X_{6} (g)$

Answer: B

Homogeneous catalysis means reactants and catalyst are in the same phase. In the lead chamber reaction,

NO

and the reactants are all gases. The other three use solid catalysts with gaseous reactants (heterogeneous).

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