D-And F-Block Elements Ques 186

Question: A metal when left exposed to the atmosphere for some time becomes coated with green basic carbonate. The metal in question is

[NDA 1999]

Options:

A) Copper

B) Nickel

C) Silver

D) Zinc

Show Answer

Answer:

Correct Answer: A

Solution:

2Cu+CO2+H2O+O2→CuCO3.Cu(OH)2Basic copper carbonate,

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