6.
Copper utensils slowly lose their shiny brown surface and gain a green
coat on prolonged exposure to atmospheric air. This is due to the
formation of a coating of
1
(A)
Copper sulphate
(B)
Copper carbonate
(C)
Cupric oxide
(D)
Cuprous oxide
P.T.O.
7
Answers
Answered by
10
Explanation:
When a copper vessel is exposed to moist air for a long time it develops a green layer on its surface. Copper corrodes by oxidation in which it reacts with oxygen in the air to form copper oxide.
Copper oxide then combines with carbon dioxide to make copper carbonate, which gives it a green colour. This process is called corrosion of copper.
Answered by
0
Answer:
The green coat is due to the basic copper carbonate formation and is a mixture of copper carbonate and copper hydroxide (CuCO3 and Cu(OH)2).
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