1.

Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid,whereas copper does not. Explain why?

Answer»

Zinc is above hydrogen rvhereas copper is below hydrogen in the activity series of metals. That is why zinc displaces hydrogen from dilute hydrochloric acid, while copper does not.
              Zn + HCl ------->ZnCl2 + H2
              Cu + HCI ------> No reaction



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