NDA General Ability Question (2025) — Solution

Step-by-step solution

Oxides can be classified as acidic, basic, amphoteric, or neutral based on their acid-base characteristics. CO (Carbon monoxide) is a neutral oxide because it neither reacts with acids nor with bases to form salts. CO_2 is an acidic oxide as it reacts with water to form carbonic acid. Na_2O and MgO are metallic oxides, which are basic in nature. Other common examples of neutral oxides include N_2O and NO. Answer: CO