Question

Which of the following metal is used for galvanising iron to protect it from rusting?

• A. $Al$
• B. $Cu$
• C. $Co$
• D. $Zn$

Answer 1

The correct option is D $Zn$

Zinc is used for galvanising iron to protect it from rusting. Using a less reactive metal than iron would allow iron to get in contact with air & moisture somehow which will lead to peeling up of the covering metal. Zinc is used because Zn corrodes faster than Iron protecting the Fe surface from corrosion.