Identify the type of reaction as combination, decomposition, displacement, or double displacement reactions.
Zn(s) + 2HCl(aq) $\to$ ZnCl₂(aq) + H₂(g)

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Solution

Reactivity series helps us to predict the reaction between a metal and an acid.
More reactive metals can displace hydrogen from acids and it is liberated as hydrogen gas.
In the reactivity series, zinc (Zn) that lies above hydrogen (H), displaces hydrogen from its acid and it is liberated as gas(H₂).
Therefore, this is a displacement reaction.

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