MHT CET Chemistry Question (2026) — Solution

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BaO is an oxide of an alkaline earth metal and is basic in nature. N _2 O _5 and CO _2 are oxides of non-metals and are acidic in nature. Al _2 O _3 reacts with both acids and bases to form salt and water, exhibiting both acidic and basic properties. Hence, it is an amphoteric oxide. Reaction with acid: Al _2 O _3 + 6 HCl 2 AlCl _3 + 3 H _2 O Reaction with base: Al _2 O _3 + 2 NaOH + 3 H _2 O 2 Na [ Al ( OH )_4] Answer: Al _2 O _3