Question

Write a scientific reason.

Always paint the grills of doors and windows before using them.

Write a scientific reason.

Always paint doors and windows before using their nets

Answer 1

1. Grills of doors and windows are generally made of iron.
2. Before painting, iron metal is in direct contact with atmospheric moisture.
3. Moist air attacks the surface of iron metal and causes rusting (i.e., corrosion of iron).
4. Contact between iron and moist air can be avoided by painting the grills of doors and windows. This prevents rusting and protects them from damage.

Hence, grills of doors and windows are always painted before they are used.