Question

Galvanisation is a process used to prevent the rusting of which of the following?

• A. Iron
• B. Zinc
• C. Aluminium
• D. Copper

Answer 1

The correct option is A

Iron

Explanation for correct answer:-

Option (A) Iron:

1. Galvanization is the process where Iron(Fe) is protected from rusting or corrosion with the help of Zinc(Zn).
2. In this process the iron is covered with a Zinc coating.
3. This zinc-coated surface avoids the corrosion and weathering effects on the iron by preventing the interaction of the surface with the atmosphere.
4. Hence correct option.

Explanation for incorrect answer:-

Option (B) Zinc:

1. In the galvanization process Zinc is only used to galvanize the iron and thus protecting it from getting corroded or rusted.
2. Hence incorrect option.

Option (C) Aluminium:

1. Since we know that Aluminium(Al) is placed higher in the reactivity series, thus it is more reactive than Zinc.
2. This is why Aluminium is not preferred for being protected by Zinc, as Aluminium would corrode faster than Zinc itself.
3. Hence incorrect option.

Option (D) Copper:

1. Copper is highly unreactive in nature.
2. So Iron is much more reactive than copper, thus copper would be getting much corroded if it does not get any protection.
3. But if Iron is not being protected, it will get rusted or corroded more faster than copper.
4. Hence incorrect option.

Therefore, galvanisation is a process used to prevent the rusting of option (A) Iron.