MHTCET 25 Apr 2025 Shift 2 Paper

Concept:Acidic oxides are non-metal oxides that react with water to form acids. Neutral oxides do not show acidic or basic behaviour.Explanation:Option A: $\mathrm{CO}$ (carbon monoxide) is a neutral oxide.It neither reacts with water to form an acid nor shows basic nature.Option B: $\mathrm{NO}$ (nitric oxide) is also a neutral oxide.It does not directly form an acid with water under normal conditions.Option C: $\mathrm{N}_{2}\mathrm{O}$ (nitrous oxide) is likewise a neutral oxide.It is neither acidic nor basic in nature.Option D: $\mathrm{N}_{2}\mathrm{O}_{5}$ (dinitrogen pentoxide) is an acidic oxide.It is the anhydride of nitric acid. It reacts with water to form nitric acid:$$\mathrm{N}_{2}\mathrm{O}_{5} + \mathrm{H}_{2}\mathrm{O} \rightarrow 2\mathrm{HNO}_{3}$$Thus, among the given oxides, only $\mathrm{N}_{2}\mathrm{O}_{5}$ shows acidic character.Answer:Option D: $\mathrm{N}_{2}\mathrm{O}_{5}$