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Chemistry
Chemistry
Problem
Three elementary steps have been proposed for a reaction mechanism: (i)
2
NO
2
→
N
2
O
4
2\text{NO}_2 \rightarrow \text{N}_2\text{O}_4
2
NO
2
→
N
2
O
4
(ii)
NO
+
O
3
→
NO
2
+
O
2
\text{NO} + \text{O}_3 \rightarrow \text{NO}_2 + \text{O}_2
NO
+
O
3
→
NO
2
+
O
2
(iii)
NO
+
O
+
O
2
→
NO
3
\text{NO} + \text{O} + \text{O}_2 \rightarrow \text{NO}_3
NO
+
O
+
O
2
→
NO
3
Identify which step is least plausible as an elementary reaction and briefly explain your reasoning in one sentence.
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