Why are the following metals not used in the lab preparation of hydrogen:
(d) Sodium?

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Solution

Sodium cannot be used for the laboratory preparation of hydrogen because sodium is a highly reactive metal. Hence due to its high reactivity it gives a uncontrolled reaction.

Chemical reaction:
$2 N a + 2 H_{2} O \to 2 N a O H + H_{2} +$ Heat

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Why are the following metals not used in the lab. preparation of hydrogen ?

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