Question

A metal X' acquires a green colour coating on outer surface on exposure to air.
i. Identify the metal 'X' and name the process (1) responsible for this change.
ii. Name and write chemical formula of the green coating formed on the metal.
iii. List two important methods to prevent the process.

Answer 1

Answer:

i)copper the process is corrosion

ii)copper carbonate CuCO3 and copper hydroxide Cu(OH)2

iii)1. polishing the surface

2.painting the surface