Question

Jamila started noticing some kind of reddish brown particles around a photo frame, which is an old one. Why it could have happened and what is it?

Answer 1

That photo frame has covered with the layer of rust.

Rusting is the process in which iron turns into iron oxide. These are formed by the redox reaction of iron and oxygen in the presence of water or air moisture. The process is a type of corrosion that occurs easily under natural conditions.