Which of the following oxides is most acidic in nature?

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Canvas Classes · Accepted Answer

🧠 The Basicity Trend
In Group 2 (Alkaline Earth Metals), as you move down the group, the atoms get bigger, the ionization energy drops, and the metal becomes more "metallic." More metallic means more basic oxides.

🗺️ The pH Map
1. The Order: .
2. The Trend: Basicity increases down the group.
3. The Extremes: 
   -  is the most basic.
   -  is the most acidic (it is actually amphoteric, reacting with both acids and bases).
4. Conclusion: Since  is the only one with acidic character in this lis

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