What is the net reaction when ozone (O3) decomposes in the presence of nitrogen monoxide (NO)?

The decomposition of ozone (O3) in the presence of nitrogen monoxide (NO) results in a reaction that effectively reduces ozone while also forming diatomic oxygen (O2) and nitrogen dioxide (NO2). The relevant net reaction is:

O3 + NO > O2 + NO2.

This indicates that ozone is reacting with nitrogen monoxide, leading to the formation of oxygen gas and nitrogen dioxide.

The correct answer illustrates how the ozone molecule undergoes a transformation that involves both oxidation and reduction processes. In this reaction, O3 is oxidized to O2, while NO is oxidized to NO2. This interplay highlights the role of NO as a radical species that can facilitate the breakdown of ozone, which is important in atmospheric chemistry and discussions regarding ozone depletion.

Overall, this net reaction demonstrates a crucial chemical interaction where nitrogen monoxide effectively participates in the ozone's decomposition, emphasizing its significance in environmental chemistry concerns.