If the sheet is turning into a pillowcase, it would be a physical change. The sheet is not changing anything but its shape to become a pillowcase, and it most likely can be reversed to turn back into a sheet.
Bleaching is chemical, colouring can be physical as well.
Bleaching a sheet and pillowcase is a chemical change because, bleaching is chemical and you can't change bleaching.
These are chemical reactions (changes).
Bleaching your hair is chemical change
Chemical change
chemical
Bleaching your hair is a chemical change. The bleach reacts in hair, removing the color in an irreversible chemical reaction. There is no way to reverse the bleaching. Bleaching your hair also makes a new substance, when you do bleach your hair it is permanent.
When bleaching your shirt it is a chemical change.
These are chemical reactions (changes).
Bleaching your hair is chemical change
It is both a physical and chemical change.
Chemical change
chemical
Bleaching your hair is a chemical change. The bleach reacts in hair, removing the color in an irreversible chemical reaction. There is no way to reverse the bleaching. Bleaching your hair also makes a new substance, when you do bleach your hair it is permanent.
Lustre is physical property of matter, so it ts a physical change.
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.
first physical, second chemical
There is a bit of both. The processes of spinning and weaving are purely physical. Bleaching and dyeing are chemical.
Yes, because it changes the composition of molecules in the hair.
This action involve a chemical reaction.