Magnetisation and demagnetisation are considered physical changes because they involve a change in the arrangement of magnetic domains within a material without altering its chemical composition. When a material is magnetised, its magnetic domains align in a particular direction, while demagnetisation causes them to return to a random orientation. These processes do not involve any chemical reactions or formation of new substances, reinforcing their classification as physical changes.
Physical.
Hammering hot iron into a sheet is a physical change. The process involves changing the shape and size of the iron without altering its chemical composition. The atoms in the iron remain the same, only the physical properties are altered.
Chemical change, oxygen binds with iron.
No. Rusting is a chemical change.
Melting is a physical change of iron.
Melting an iron rod is a physical change
Magnetisation and demagnetisation are considered physical changes because they involve a change in the arrangement of magnetic domains within a material without altering its chemical composition. When a material is magnetised, its magnetic domains align in a particular direction, while demagnetisation causes them to return to a random orientation. These processes do not involve any chemical reactions or formation of new substances, reinforcing their classification as physical changes.
Melting iron is a physical change because it does not alter the chemical composition of the iron. It is a change in state from solid to liquid without forming a new substance.
Melting iron is a strictly physical change (change of state). The molten and solid iron would be identical by any chemical test or reaction.
Iron is a chemical element, not a "change".
Iron is a chemical element, not a "change" !
physical
Heating is a physical change.
Because the Iron in the nail is no longer just iron but oxidation plus iron, a physical change to the nail would be to cut it in-half.
no it is a chemical change
Physical.