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Explain why 1-butyne produces white prec...

Explain why 1-butyne produces white precipitate with ammoniacal `AgNO_3` solution but 2 butyne does not respond to this reaction.

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1-butyne `[CH_3-CH_2-C-=CH]` contains acidic hydrogen. Hence it will react with ammoniacal `AgNO_3` solution to form a white precipitate of `CH_3-CH_2-C-=C-Ag` but due to the absence of acidic hydrogen, 2-butyne `[CH_3-C-=C-CH_3] does not respond to this test.
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