Question

which of the following are used to preserve fruits and vegetables or as coating for electrical wire? answer options: select one of four urea-formaldehyde plastics polyvinyl plastics polyester resins polyethylene resins feedback: incorrect. the commercial applications of these plastics are numerous, with new applications being developed all the time. try again.

Explanation:

To solve this, we analyze the applications of each option:

• Urea - formaldehyde plastics: Mainly used in making molded products like electrical fittings, not for fruit/veg preservation or wire coating.
• Polyvinyl plastics (e.g., PVC): Can be used for coating electrical wires (due to insulation properties) and in food packaging (like preserving fruits/vegetables in some cases).
• Polyester resins: Used in fiberglass, coatings for boats, etc., not for the given applications.
• Polyethylene resins: Mainly for packaging (like plastic bags) but not typically for wire coating.

So the correct option is Polyvinyl plastics.

Answer:

B. Polyvinyl plastics