Question

Which of the following oxides form dimer ?

• A. $N_2O$
• B. $N_2O_3$
• C. $NO_2$
• D. $N_2O_5$

Answer 1

Answer: (C)

$NO_2$

Answer 2

$NO_2$ has one unpaired electron on Nitrogen, due to which it forms the dimer $N_2O_4$.