A metal is left exposed to the atmosphere for some time. It becomes coated with green basic carbonate. The metal must be

Question

A metal is left exposed to the atmosphere for some time. It becomes coated with green basic carbonate. The metal must be, Nickel, Chromium, Copper, Zinc

MARKS App · Accepted Answer

Here the metal is copper and green mass is of C u ( O H ) 2 . C u C O 3 2 C u + H 2 O + C O 2 + O 2 → C u ( O H ) 2 . C u C O 3 G r e e n m a s s

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