Question

Rub aluminium wire and Iron nail on a cement floor. Can you see shiny appearance When it is kept for some days, its shining appearance is lost. Why?​

Answer 1

Answer:

If the carbon content is over 2%, the metal is called cast iron, because it has a relatively low melting point and is easily cast. It is quite brittle, however, and cannot be forged so therefore not used for blacksmithing.

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