Can sulfur form sulfuric acid?
Yes. Burning sulfur in air will produce sulfur dioxide, which can then react with water to form sulfuric acid.
It'd be a pretty silly name otherwise, wouldn't it? Yes, it's possible to form sulfuric acid from sulfur.
How does acid rain form? The burning of coal that contains a lot of sulfur produces sulfur oxides, substances composed of oxygen and sulfur. Acid rain forms when nitrogen oxides and Sulfur oxides combine with water in the air to form nitric acid & sulfuric acid. (Acid rain also another way of saying Nitric acid & Sulfuric acid)