Which of the following substances does hydrochloric acid interact with: Zn; Cu; Cu (OH) 2; P2O5; Na2S

Of the above compounds, hydrochloric acid will not react only with phosphorus oxide.

1.2HCl + Zn = ZnCl2 + H2. Displacement of hydrogen and formation of chloride.

2.2HCl + Cu = CuCl2 + H2.

3.2HCl + Cu (OH) 2 = CuCl2 + 2H2O. Salt and water production.

4.2HCl + Na2S = H2S + 2NaCl. Formation of salt and hydrogen sulfide.

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