Question

You leave your bicycle out in the rain and it rust is a physical or chemical change

Answer 1

It’s a chemical change

Answer 2

Answer:

The process when the iron rusts in the rain is a chemical change.Since the iron is exposed to oxygen and water. Generally, in my opinion it's not a good idea to leave your bicycle in the rain,it'll start with chain,it can spread to other parts of a bicycle,so dont do that.

Good luck!

Intelligent Muslim,

From Uzbekistan.