Which of the following statements is correct?
- ANitrogen is unreactive due to the absence of lone pairs in the molecule.
- BAqueous ammonia contains both $\mathrm{NH_3(aq)}$ and $\mathrm{NH_4^+(aq)}$. The $\mathrm{NH_4^+(aq)}$ ion is a Brønsted-Lowry acid.
- CHigh temperatures are needed to supply the energy to break the strong double bonds in nitrogen molecules when they react.
- DAtmospheric $\mathrm{SO_2}$ reacts with unburnt hydrocarbons to form a component of photochemical smog.