Name one metal that reacts very slowly with boiling water to liberate hydrogen.

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Solution

Magnesium is a metal that reacts very slowly with boiling water to liberate hydrogen.
The other product formed in the reaction is magnesium hydroxide.
$\underset{Magnesium}{Mg (s)} + \underset{water (boiling)}{2 H_{2} O (l)} \to \underset{Magnesium hydroxide}{Mg {(OH)}_{2} (s)} + \underset{Hydrogen}{H_{2} (g) }$

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