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Zinc liberates hydrogen gas when reacted...

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

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In the activity series of metals, zinc is placed above hydrogen whereas copper is placed below hydrogen. That is why zinc displaces hydrogen from dilute hydrochloric acid and liberates hydrogen gas, while copper does not.
`Zn+HCl to ZnCl_(2) +H_(2)`
`Cu+HCl to `No reaction
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