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.

NO SPAM.
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Answer 1

ANSWER :

(i) Metal is copper. The process is called corrosion.

(ii)Basic copper carbonate. [CuCO3.Cu(0H)2].

(iii)

➡️ It should be coated with tin.

➡️ It should be mixed with other metals to form alloys.

Answer 2

Answer:

HEY!!

HERE IS YOUR ANSWER,

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

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

3) Alloying, galvanisation.

HOPE IT HELPS YOU,

THANK YOU. ☺️