No, sulfur dioxide (SO₂) is not a basic oxide. It is actually an acidic oxide.

Here's why:

* Acidic oxides react with water to form acids. Sulfur dioxide reacts with water to form sulfurous acid (H₂SO₃):

SO₂ (g) + H₂O (l) → H₂SO₃ (aq)

* Basic oxides react with water to form bases. Sulfur dioxide does not react with water to form a base.

Therefore, sulfur dioxide is classified as an acidic oxide.