Is bleaching a stain out of a article clothing a chemical change or a physical change?

Answer 1

Bleaching is done by oxidising chemicals like hypochlorite (bleaching powder) or peroxides. So it is a chemical change(called reaction): the stain is not (only) dissolved, but (rather) broken down to colorless molecules.

Additions to this answer are on the discussion area.

Answer 2

Bleaching a stain out of clothing is a chemical change. The bleach interacts with the stain molecules, breaking them down and changing their chemical composition. This process cannot be reversed, unlike physical changes which only affect the appearance or state of a substance.