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11th Class Physics Motion In a Plane / समतल में गति Question Bank 11th CBSE Physics Mathematics Two Dimensional Motion, Relative Motion

  • question_answer
    Copper has positive electrode potential hence it cannot be oxidised by H+ ion then how it is oxidised by nitric acid. Or Cu does not dissolve in HCl but dissolves in HNO3. Why?  

    Answer:

    Copper has positive electrode potential (0.34 V) hence it cannot be oxidised by H+ ion. However Cu is oxidised in nitric acid by nitrate (NO3-) ion not by H+ ion. This is why Cu dissolves in HNO3 but not in HCl.     


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