Question

Which one of the following layers of a metallic compound can be formed on electric wire as insulator during rainy season and causes the power supply to our home from the electric pole to be interrupted?

• A. Metal sulphide
• B. Metal oxide
• C. Metal carbonate
• D. Metal peroxide

Answer 1

The Correct Option is B

During the rainy season, electric wires—especially those made of metals like copper or aluminum—can react with moisture, carbon dioxide from the air, and environmental pollutants.

These reactions can lead to the formation of a greenish or whitish insulating layer of Metal oxide (e.g., copper carbonate on copper wires), which are poor conductors of electricity.

This insulating layer can interfere with proper current flow and cause power supply interruptions from electric poles to homes.

Correct answer: Metal oxide

Answer 2

The correct answer is Metal oxide. During the rainy season, water and moisture can cause the formation of a metal oxide layer on the surface of the electric wires. Metal oxides, such as copper oxide (CuO) or aluminum oxide (Al₂O₃), are poor conductors of electricity. When these oxides form on electric wires, they act as insulators and can cause interruptions in the power supply by blocking the flow of electrical current. Thus, the correct answer is Metal oxide.