JAMB Chemistry 2024 Paper

Concept:Nitrogen(I) oxide, which has the formula $\mathrm{N}_{2}\mathrm{O}$, releases oxygen when heated and can therefore rekindle a glowing splint.Explanation:Nitrogen(I) oxide is also called nitrous oxide or dinitrogen monoxide, with the formula $\mathrm{N}_{2}\mathrm{O}$.When a glowing splint is placed in a jar of $\mathrm{N}_{2}\mathrm{O}$, the heat of the splint causes the gas to decompose into nitrogen and oxygen.The oxygen produced supports combustion, so the glowing splint bursts into flame again.Nitrogen(II) oxide is nitrogen monoxide, $\mathrm{NO}$, and it is not the same as nitrogen(I) oxide.Nitrogen(IV) oxide, $\mathrm{NO}_{2}$, and dinitrogen tetraoxide, $\mathrm{N}_{2}\mathrm{O}_{4}$, do not rekindle a glowing splint.Thus, the oxide of nitrogen that rekindles a glowing splint is nitrogen(I) oxide.Answer:A. nitrogen(I) oxide