To protect steel and iron from rusting, a thin layer of which one of the following metals is applied?

Galvanization is a method of protecting iron from rusting by coating with a thin layer of

Which one of the following is essential in corrosion of iron metal?

Which one among the following metals is not stored under oil ?

Which one of the following is called the 'metal of future'?

Which one of the following metals floats in cold water?