Anodising is a process of forming a thick oxide layer of

Aluminium surface is often 'Anodized'. This means the deposition of a layer of –

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 of the following is lighter than water?

Which of the following is most ductile?