You are provided with some compounds in the box.

You are provided with some compounds in the box.

[SO₂, PbO, CO, K₂SO₄, H₂SO₄, CH₃COOH, NaHSO₄, KCl]

Choose the compound from the above box that fits the descriptions from (a) to (c).

(a) An acid present in vinegar.

(b) An oxide which dissolves in water forming an acid.

(c) A salt formed by the incomplete neutralization of an acid by a base.