Give a reason why electrical wires are coated with plastic.

(N/A) Electrical wires are typically made of copper,which is an excellent conductor of electricity. However,copper is reactive and can undergo corrosion when exposed to moist air containing carbon dioxide,leading to the formation of a green layer of copper carbonate. Furthermore,copper is a metal and poses a risk of electric shock if touched directly. Plastic acts as an insulator,preventing electric shocks and protecting the metal wire from environmental corrosion.