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"Sodium does ...

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"Sodium does not form carbide, $N a_{2} C_{2}$ with carbon but $N a_{2} C_{2}$ can be formed when sodium reacts with acetylene."
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Solution

The statement is true.
Sodium does not form carbide, $N a_{2} C_{2}$ with carbon but $N a_{2} C_{2}$ can be formed when sodium reacts with acetylene.
Sodium acetylide $(N a_{2} C_{2})$ is formed when sodium reacts with acetylene.

$C H \equiv C H + 2 N a \to N a - C \equiv N a$

(sodium acetylide)

Among alkali metals, only lithium forms a carbide ( $L i_{2} C_{2}$ ) similar to that of calcium. The other alkali metals do not form stable carbides, although they do react with the graphite form of carbon to give intercalation compounds and di-substituted acetylides.

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