Which of the following statements is not correct?
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- Copper does not liberates hydrogen from acids.
$\text{Cu}+2\text{H}_2\text{SO}_4\rightarrow\text{CuSO}_4+\text{SO}_2+2\text{H}_2\text{O}$
$3\text{Cu}+8\text{H}\text{NO}_3\rightarrow3\text{Cu(NO}_3)_2+2\text{NO}+4\text{H}_2\text{O}$
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