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 of the green coating formed on the metal (iii) List two important methods to prevent the process.

Answer 1

Due to oxidation, the copper becomes green in exposure of air and it polished according to the color to prevent the oxidation.

This quickly denotes the green substance as it is called Patina and thus oxidation that is responsible for this change with green in exposure of air.

This is considering as patina which is responsible for changing to Cu+O2.

Answer 2

Hello mate,

Here is your answer

a) Due to oxidation, the copper becomes green in exposure of air and it polished according to the color to prevent the oxidation.

b) Cu2(OH)2CO3 - basic copper carbonate

c) Alloying, galvanisation

HOPE THIS HELPS UU :)

AND STAY BLESSED.