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Metallic sodium does not react normally with:

1. gaseous ammonia
2. But-2-yne
3. Ethyne
4. tert-butyl alcohol

Correct answer: But-2-yne

Solution

But-2-yne is a stable alkyne that does not readily react with metallic sodium under normal conditions, as it lacks the necessary functional groups or reactivity to engage in a reaction with sodium.

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