What do you see when concentrated nitric acid is added to copper. – InterviewSolution

1.

What do you see when concentrated nitric acid is added to copper.

Answer»

A pungent smelling reddish brown coloured gas (NO₂) is produced and the solution turns greenish blue.

Cu + 4HNO₃ (cone.) → Cu (NO₃ )₂ + 2H₂O + 2NO₂

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