Question

In galvanization, iron sheets are dipped in molten

• A. gold
• B. silver
• C. zinc
• D. copper

Answer 1

The correct option is C

zinc

The explanation for the correct option-

(C) Zinc

• Galvanization - The process of coating the articles of iron$\left(\mathrm{Fe}\right)$ with a protective layer of zinc$\left(\mathrm{Zn}\right)$ metal to prevent rusting is called galvanization.
• Zinc is used for galvanization due to following reasons-
• It is cheap and easily available.
• It is non-reactive and is not affected by air and water.

The explanation for the incorrect options-

(A) Gold $\left(\mathrm{Au}\right)$ - It is a very rare and highly costly metal and is used in ornaments and hence, cannot be used for galvanization.

(B) Silver $\left(\mathrm{Ag}\right)$ - It is an ornamental metal like gold and hence, cannot be used for galvanization.

(D) Copper $\left(\mathrm{Cu}\right)$ - It cannot be used in galvanization because like iron, copper also gets corroded when exposed to the air and water.

Hence, option (C) is correct. In galvanization, iron sheets are dipped in molten zinc.