_________ metal reacts with water to liberate hydrogen.

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Solution

Sodium can displace hydrogen from water.
$2 Na + 2 H_{2} O \to \underset{Sodium hydroxide}{2 NaOH} + H_{2} $
Therefore, sodium metal reacts with water to liberate hydrogen.

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_________ metal reacts with water to liberate hydrogen.

Sodium can displace hydrogen from water.2Na+2H2O→2NaOHSodiumhydroxide+H2​Therefore, sodium metal reacts with water to liberate hydrogen.

Sodium can displace hydrogen from water.
$2 Na + 2 H_{2} O \to \underset{Sodium hydroxide}{2 NaOH} + H_{2} $
Therefore, sodium metal reacts with water to liberate hydrogen.