What happens when a piece of aluminium metal is added to dilute hydrochloric acid?

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No reaction

Hydrogen gas is evolved

Hydrogen displaces Aluminium

Aluminium chloride is formed along with dilute hydrochloric acid

answer is C.

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Detailed Solution

Aluminium and dilute HCl react to produce an aqueous and gaseous byproduct. Aluminium reacts with dilute $H C l$ at room temperature. The metal dissolves in $H C l$ , to give aluminium chloride and colourless hydrogen gas.
This reaction is found to be irreversible since the final products will not react with each other. An oxidation-reduction reaction occurs when metallic aluminium and hydrochloric acid are combined.
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Aluminium reacts with an acid to generate aluminium salt and gaseous hydrogen in a typical single displacement reaction.
Hence, the addition of aluminium metal to dilute $H C l$ produces hydrogen gas.

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