$PCl_5$ exists but $NCl_5$ does not because:

When ammonia is passed over heated $CuO$,it is oxidised to

In which of the following reactions is there no liberation of nitrogen gas?

Select the correct diagram related to the chemical reactions of nitric oxide $(NO)$.

Which oxide of nitrogen is obtained on heating ammonium nitrate at $250 \, ^oC$?

White phosphorus on reaction with concentrated $NaOH$ solution in an inert atmosphere of $CO_{2}$ gives phosphine and compound $(X)$. $(X)$ on acidification with $HCl$ gives compound $(Y)$. The basicity of compound $(Y)$ is