question_answer

Which one of the following oxides of nitrogen dimerises into colorless is solid/liquid on cooling?

A)  \[{{N}_{2}}O\]                                 

B)  \[NO\]  

C)  \[{{N}_{2}}{{O}_{3}}\]  

D)         \[N{{O}_{2}}\]

E)  \[{{N}_{2}}{{O}_{5}}\]

Correct Answer: D

Solution :

\[N{{O}_{2}}\]exists in gaseous state while at low temperature, it exists in solid state as a dimer \[{{N}_{2}}{{O}_{4}}\].