The correct answer is D. Plastics are excellent electric insulators.
Plastics are a diverse group of materials that are made from long chains of molecules called polymers. They are typically lightweight, strong, and durable. Plastics are also resistant to many chemicals and can be molded into a variety of shapes. However, plastics are not good conductors of electricity. This is because the long chains of molecules in plastics are not able to carry an electric current.
A. Plastics are chemical resistant. This is because the long chains of molecules in plastics are not easily broken down by chemicals. This makes plastics ideal for use in products that need to be resistant to chemicals, such as food packaging and medical devices.
B. Plastics are durable. This is because the long chains of molecules in plastics are strong and can withstand a lot of wear and tear. This makes plastics ideal for use in products that need to be durable, such as furniture and appliances.
C. Plastics are ductile. This means that they can be stretched and pulled without breaking. This makes plastics ideal for use in products that need to be flexible, such as hoses and cables.