If copper is kept open in the air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of
  1. CuSO4
  2. CuCO3
  3. CU(NO3)2
  4. CuO

AcademicChemistryNCERTClass 10

Correct Answer: (b) CuCO3

Explanation: Copper reacts with CO2 present in the air and forms a green coating on its surface due to the formation of basic copper carbonate [CuCO3.Cu(OH)2] as:

"NCERT

raja
Updated on 10-Oct-2022 12:47:03

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