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

Aluminium displaces hydrogen

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Aluminium chloride is formed along with dilute hydrochloric acid

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Hydrogen gas is evolved

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Solution

The correct options are
A Aluminium displaces hydrogen
C Hydrogen gas is evolved
The reactivity series follows the order :
Al>Zn>Fe>Pb>H>Cu
Thus, aluminium being more reactive than hydrogen, displaces the latter in hydrochloric acid $(H C l)$ to form aluminium chloride ( $A l C l_{3}$ ) and releases $H_{2}$ gas

$2 A l (s) + 6 H C l (a q) \to 2 A l C l_{3} (a q) + 3 H_{2} (g)$

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