Question

Among N₂O₃, P₄O₆ and As₄O₅, which is most acidic?

Answer 1

1. Among N₂O₃, P₄O₆, and As₄O₆, all are acidic oxides.
2. The acidity decreases down the group from nitrogen to arsenic.
3. Therefore, N₂O₃ is the most acidic, followed by P₄O₆, then As₄O₆.
4. This is because nitrogen forms stronger pπ-pπ multiple bonds, and its oxides behave more acidically.

Hence, N₂O₃ is the most acidic among them.