Which statement is right?
- AAn ammonium ion is basic due to a lone pair of electrons on the nitrogen atom.
- BNitrogen monoxide, $\text{NO}$, reacts with peroxyacetyl nitrate to produce a component of photochemical smog.
- CNitrogen dioxide catalyses the oxidation of atmospheric sulfur dioxide.
- DNitrogen is very unreactive due to the very strong permanent dipole-permanent dipole attractions between the nitrogen atoms.