Question

In which of the following methods a protective zinc coating is applied to iron articles to prevent them from rusting?

• A. Oiling
• B. Painting
• C. Galvanization
• D. Alloy formation

Answer 1

The correct option is C

Galvanization

The explanation for the correct option -

• The process of corrosion of Iron articles in the presence of damp air is known as rusting.
• During rusting of Iron, a reddish-brown flaky layer will be formed on the surface of the Iron object which is known as rust.
• In order to prevent Iron articles from rusting, some methods like Galvanization, painting, oiling, etc are used.
• Galvanization is a process in which a protective Zinc coating is applied to Iron articles or articles made up of steel to prevent them from rusting.
• The Iron articles which are in direct contact with water are usually galvanized to increase their life.

The explanation for incorrect options -

• Option A is incorrect because in the process of oiling a thin layer of oil or grease is applied on the surface of iron articles.
• Option B is incorrect because in the process of painting a layer of different paints like red Lead, oil painting, plastic coating, enamel coating, coal tar, etc is put on an Iron article.
• Option D is incorrect because, during the process of alloy formation, Iron metal is fused with metals like Nickel$\left(\mathrm{Ni}\right)$, Chromium$\left(\mathrm{Cr}\right)$ or Carbon$\left(\mathrm{C}\right)$ to form stainless steel.

Hence, Option C is correct answer.