Choose the correct chemical equation for the reaction of magnesium metal with hydrochloric acid.

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

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$M g (s) + H C l (a q) \to M g C l_{2} (a q) + H (g)$

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$M g (s) + 2 H C l (a q) \to M g C l (a q) + H_{2} (g)$

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$M g (s) + 2 H C l (a q) \to 2 M g C l (a q) + H_{2} (g)$

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Solution

The correct option is A
$M g (s) + 2 H C l (a q) \to M g C l_{2} (a q) + H_{2} (g)$

As magnesium is more reactive than hydrogen,it easily displaces hydrogen from hydrochloric acid.
$M g (s) + 2 H C l (a q) ⟶ M g C l_{2} (a q) + H_{2} (g)$

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