Which of the following statements about the oxides of nitrogen are correct?

ASolid $N X_{2} O X_{5}$ consists of $NO X_{2} X^{+}$ and $NO X_{3} X^{-}$ ions.
B $NO X_{2}$ is an angular molecule and is paramagnetic.
C $N X_{2} O$ is a linear molecule.
DGaseous nitric oxide exists mainly as the dimer $(NO) X_{2}$ at room temperature.

Answer: A, B, C

NO X_{2}

has an unpaired electron and a bent structure;

N X_{2} O

is linear (

N - N - O

); solid

N X_{2} O X_{5}

[NO X_{2}] X^{+} [NO X_{3}] X^{-}

NO

is monomeric in the gas phase at room temperature, so the third statement is false. Correct: A, B, D.