Question

A metal 'X' acquires a green colour coating on its surface on exposure to air.
(i) Identify the metal 'X' and name the process responsible for this change.
(ii) Name and write chemical formula on the metal.
(iii) List two important methods to prevent the process.

Answer 1

Answer:

1. The metal is copper.
2. $2 cu \: + o2 \: - - - > 2cuo$This is due to oxidizing or exposure of copper with moisture in the air.
3. refer to the equation above
4. Coating Copper with a material such as paint/oil etc can prevent oxidizing

Hope this helps

Answer 2

1). Metal "X" is copper the process is corrosion..

2). Copper (Cu) *LATIN NAME Cuprum..

3).By oiling and greasing.

4). By take it away from air