Question

Zinc is used in the galvanising of iron and not the copper

Answer 1

Zinc is more reactive than iron, it is used to protect it from corrosion because when oxygen in the air reacts with the surface of zinc, a very dense and impermeable coating of zinc oxide is formed and it is this physical barrier that protects the zinc surface from further attack.

Answer 2

Heyaa buddy,

● Answer -
Cause Zn is more reactive than Fe, but Cu is not.

● Explaination -
- Galvanizing is the process of applying a protective zinc coating to steel or iron, to prevent rusting.
- In this process, zinc coating reacts with air to form zinc oxide which prevents O2 from reacting with iron.
- For this to occur, metal to be coated must be more reactive than iron.
- As Zn is more reactive than Fe, it is used in galvanising.
- Because of its low reactivity, Cu can't be used for galvanizing.


Hope this helps...