Question

Which of the following oxide of nitrogen is most thermally stable?

• A. $N_{2}O_{5}$
• B. $N_{2}O$
• C. $NO$
• D. $N_{2}O_{3}$

Answer 1

Answer: (C)

$NO$

Answer 2

$NO$ is the most thermally stable oxide of nirtogen $2NO { ->[900^{\circ}C] }N_{2}O_{2}$ $2N_{2}O { ->[500-900^{\circ}C] }2N_{2}+O_{2}$ $N_{2}O_{3} { ->[{\text{Room temperature}}] }NO+O_{2}$ $2N_{2}O_{5} { ->[40^{\circ}] }4NO_{2}+O_{2}$