Question

1)define corrosion
2) how can we prevent corrosion
3) what is formed by the corrosion of iron
4)why corrosion of iron a serious problem

5)how will you recognise corrosion of silver

Answer 1

Ans 1). When metal is attacked by the things around it such as moisture or acid it is said to be corrode and this process is known as corrosion
Ans 3). Rust is formed by the corrosion of iron
Ans 4). The stability of the structure decreases
Ans 2). In image.
Ans 5). Black coating on silver

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Answer 2

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When a metal is atacked by its surrounding air , moisture , acid etc it is said to be corroded . The process is called corrosion.

Electrochemical corrosion of metals occurs when electrons from atoms at the surface of the metal are transferred to a suitable electron acceptor or depolarizer. Water must be present to serve as a medium for the transport of ions.