Question

rusting of iron is a chemical change.why ?

Answer 1

Rusting of iron is a chemical change because it is two substance reacting together to make a new substance (iron and air).

Answer 2

The rusting of iron is a chemical change because it is two substances reacting together to make a new substance. When iron rusts, iron molecules react with oxygen molecules to make a compound called iron oxide. Rusting would only be physical change if iron molecules remained pure iron throughout the process.........
Hope this answer helps you...........