Question

Galvanization is done to prevent

• A. Rusting
• B. Burning
• C. Freezing
• D. Melting

Hint:

Remember: Galvanization = coating iron with Zinc to prevent Rust. The key principle is sacrificial protection --- zinc is more reactive than iron in the electrochemical series, so zinc corrodes preferentially, protecting the iron beneath. Other corrosion-prevention methods include painting, oiling, tinning (coating with tin), and alloying (stainless steel).

Answer 1

The Correct Option is A

Step 1: Understand the word galvanization.
Galvanization means coating iron or steel with a thin layer of zinc. We need to find what damage this coating stops.

Step 2: What is rusting.
Rusting happens when iron meets oxygen and moisture in the air. The iron slowly turns into a reddish brown flaky material called rust, which weakens the metal.

Step 3: How the zinc layer helps.
The zinc coating sits on top of the iron and keeps air and water away from the iron surface. So the iron cannot react and rust.

Step 4: Extra protection from zinc.
Even if the coating gets a small scratch, zinc reacts before iron does because zinc is more reactive. This way the zinc sacrifices itself and saves the iron. This is called sacrificial protection.

Step 5: Check the other options.
Burning, freezing, and melting are about heat or temperature, not about a metal coating. Galvanization has nothing to do with them.

Step 6: Conclude.
Galvanization is done mainly to stop iron from rusting.
\[ \boxed{\text{Rusting}} \]