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1. Copper objects lose their luster or shine after some time. The surface of these objects acquire a green coating of basic copper carbonate CuCO_3.Cu(OH)_2 which is called rust of copper. This is due to
2. Rusting of iron is a chemical reaction. The reaction can be termed as
Answer variants:
Decomposition
Combination
Attack of H_2O, O_2 & CO_2 present in the atmosphere on the surface of copper
Attack of H_2O & O_2 present in the atmosphere on the surface of copper
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