Which of the following oxides of nitrogen is a blue solid?

Phosphine is produced by adding water to

Which of the following statements is incorrect for nitrogen dioxide $(NO_2)$?

Extra pure $N_2$ can be obtained by heating :-

Small quantities of $NO$ and $HNO_3$ are formed as impurities when $N_2$ is prepared from $NH_4Cl_{(aq)}$ and $NaNO_{2(aq)}$. These impurities can be removed by passing the $N_2$ gas through which of the following?

In the nitrogen group,as we move from $N$ to $Sb$,the $H-M-H$ bond angle in the hydrides approaches $90^o$ because ......