How will you distinguish between but-1-yne and but-2-yne ?

1.	How will you distinguish between but-1-yne and but-2-yne ?
Answer» Solution :But-1-yne is a terminal alkyne. THEREFORE, it gives white ppt. of silver but-1-ynide with Tollen's reagent and red ppt. of copper but-1-ynide with AMMONIACAL cuprous chloride. `underset"But-1-yne"(CH_3CH_2C-=CH) + underset"Tollen's reagent"([Ag(NH_3)_2]^(+)OH^-) to underset"Silver but-1-ynide"(CH_3CH_2C-=C-Ag) + 2NH_3+H_2O` `underset"But-1-yne"(CH_3CH_2C-=CH) + underset"Diammine copper (I) hydroxide"(2[CU(NH_3)_2]OH^-) to underset"Copper but-1-ynide (red ppt.)"(CH_3CH_2C-=C-Cu) + 2NH_3+H_2O` But-2-yne, on the other hand , being a non-terminal alkyne does not GIVE these reactions.

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