The copper vessels used in homes are found to be coated with green
colour. Answer the following.
a) What is the chemical composition of the green coating?
b) Why do copper vessels form such a green coating?
c) What is the name of the phenomenon, responsible for the green
coating?
d) Copper vessels are best cleaned with tamarind or lemon juice, but
not with soap. Why?
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Answer:
What is the chemical composition of the green coating?
ANSWER = The green coating formed on the copper when it is exposed to air is a mixture of copper carbonate - CuCO3 and copper hydroxide - Cu(OH)2
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