Answer:
Reasonable Second step- [tex]N_{2}O(g)+H_{2}(g)\rightarrow N_{2}(g)+H_{2}O(g)[/tex]
Explanation:
The given single step chemical reaction is as follows.
[tex]2H_{2}(g)+2NO \rightarrow 2H_{2}O(g)+N_{2}(g)[/tex]
Suppose a two-step mechanism is proposed for this reaction,
The reaction occured in two steps they are as follows.
[tex]Step -1:H_{2}(g)+2NO \rightarrow N_{2}O(g)+H_{2}O(g)[/tex]
[tex]Step-2:N_{2}O(g)+H_{2}(g)\rightarrow N_{2}(g)+H_{2}O(g)[/tex]