Magnetizing doesn't involve a chemical reaction.
Physical.
Physical one.
Color is a physical change always.
It is not a chemical change. The iron and sand can be separated out.
Chemical change, oxygen binds with iron.
No. Iron is naturally magnetic.
No, magnetization is not a chemical reaction. Magnetic iron and non-magnetic iron are chemically the same substance. Magnetization is a process of alignment of atomic magnetic fields, which is a purely physical change, not a chemical change.
physical change
Melting is a physical change of iron.
Melting an iron rod is a physical change
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
Physical change
When it combines with Oxygen. Commonly called Rust.
The process of iron rusting is a chemical change.