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Q.

Copper is very slowly oxidized on the surface in moist air, giving a green coating of verdigris is:

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a

CuSO4 

b

Cu2O

c

CuCO3

d

CuCH3COO2Cu(OH)2

answer is C.

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Detailed Solution

Molecular formula of verdigris is CuCH3COO2Cu(OH)2 and it is formed when Cu is exposed to the surrounding in the presence of acetic acid and moist air (consisting of carbon dioxide, water vapour and oxygen).

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