Question

Rusting of a iron is a chemical change but magnetizing and demagnetizing of iro is a physical change.Give reasons

Answer 1

Answer:

Magnetization of iron occurs to due to the temporary alignment of the electrons present in it in one direction only. This is done by rubbing the north pole of the magnet on the middle if the magnet towards its end. It is temporary because after some time, the electrons divert from the alignment.

However, iron rusts because its surface adsorbs oxygen (meaning only the surface reacts with oxygen). It is a chemical reaction where new compounds are formed. So obviously, rusting of iron is a chemical change, but magnetization of iron is not.

Explanation:

Answer 2

Answer:

Yes. Aligning the structure of grains.

Explanation:

Because of magnetizing