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It is both a physical and chemical change.
There is a bit of both. The processes of spinning and weaving are purely physical. Bleaching and dyeing are chemical.
Physical.
It is PHYSICAL CHANGE because it does not change into another substance and it does not have chemical reaction, it can be sewn back to return to its original form.
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.
It is both a physical and chemical change.
Bleaching your hair is chemical change
chemical
Chemical change
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.
These are chemical reactions (changes).
first physical, second chemical
A physical change. A chemical change would be, for example, burning clothes, or dissolving clothes.
There is a bit of both. The processes of spinning and weaving are purely physical. Bleaching and dyeing are 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.
Sewing clothes is a physical change from fabric into clothes we can wear.
Physical.