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Galvanisation is a method of protecting iron from rusting by coating with a thin layer of
(i) Gallium
(ii) Aluminium
(iii) Zinc
(iv) Silver
Answer
In order to prevent rusting of iron, it is coated with a layer of Zinc and this process is known as galvanisation .
If you look at the reactivity series, you will notice that zinc is a metal that is only slightly more reactive than Fe , unlike other metals.
This makes Zinc act as the protective layer which corrodes faster than iron, but not so fast that it corrodes away, and cannot protect Iron for a longer period of time.
So, the correct answer is (c) Zinc
