Question

Which of the following oxides of nitrogen is not an air pollutant?

• A. $N{O}_2$
• B. $N_{2}O$
• C. $N_2{O}_5$
• D. $NO$

Answer 1

Answer: (B)

$N_{2}O$ is not an air pollutant. It is commonly known as laughing gas. It is a colourless, non-flammable gas possesing sweet odour and taste.