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Chemistry-10th Metals and Non-metals Easy

If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due…

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
  1. (a)
  2. (b)
  3. (c)
  4. (d)

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