Check sibling questions

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.

reactivity-series-of-metals.jpg

So, the correct answer is (c) Zinc

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CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Accounts and English at Teachoo