If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of (a) CuSO4 (b) CuCO3 (c) Cu(NO3 ) 2 CuO
ScienceClass 10CBSEAnswered 27 Mar 2026
Answer
- Soln:
Answer is (d) CuO
Explanation:
On exposure to air copper reacts to atmospheric oxygen to form copper oxide layer which is green in color.