Question

External metal doors are generally painted with oil paint.justify

Answer 1

Answer:

The external metal doors are generally painted with oil paint because when metal are left in humid areas a brown substance deposits on it called rust. As we know rusting is a chemical change and it cannot be reversed, to prevent rusting metals doors are painted with oil paint.....

Answer 2

Answer:

When metal objects are near humid areas, they start rusting. Rusting is a chemical change as it forms a new substance and is irreversible. Oil helps tto slow down the rusting process. That is why external metal doors are generally painted with oil paint.

Hope this helps