A) \[{{N}_{2}}(g)+3{{H}_{2}}(g)\xrightarrow[{}]{Fe}2N{{H}_{3}}(g)\]
B) \[2S{{O}_{2}}(g)+{{O}_{2}}(g)\xrightarrow[{}]{NO}2S{{O}_{3}}(g)\]
C) \[CO(g)+3{{H}_{2}}(g)\xrightarrow[{}]{Ni}C{{H}_{4}}(g)+{{H}_{2}}O(g)\]
D) \[2S{{O}_{2}}(g)+{{O}_{2}}(g)\xrightarrow[{}]{{{V}_{2}}{{O}_{5}}}2S{{O}_{3}}(g)\]
Correct Answer: B
Solution :
When the physical states (such as solid, liquid, gas) of reactants and catalyst are same then such type of catalysis is known as homogeneous catalysis. \[2S{{O}_{2}}(g)+{{O}_{2}}(g)\xrightarrow[{}]{NO(g)}2S{{O}_{3}}(g)\] In the above reaction both reactants and catalyst are in the gaseous state.
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