Question

A metal p when exposed to the moist air for longer period of time loses its shiny brown surface and gains a green coat. Why this happened identify the metal write the name and chemical formala of this grren coloured compound list any two ways to prevent this process

Answer 1

the metal is copper.copper reacts with moist carbon dioxide in air and slowly loses its shiny brown surface and gains a green coat.the green substance is basic copper carbonate.

chemical formula of basic copper carbonate=CuCO₃.Cu(OH)₂

Answer 2

Hi friends

Here is your answer I hope this will help you .

The metal has corroded because of being exposed to moist air.

Green compound is basic copper carbonate [CuCO3. Cu (OH)2]

The metal is copper.

Two ways to prevent this process :

Painting, Greasing, Oiling, Galvanizing (any two)