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CGP EDU Academic Team
Published on: August 12, 2026
Give the chemical test to distinguish between 2-butyne and 1-butyne.
Text Solution
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Sol. Butyne-1
It has acidic terminal H-atom and gives a red ppt. with ammonical Cu2Cl2.
CH3 – CH2 – C ≡ CH 
CH3CH2 – 
Butyne-2
It has no terminal acidic H-atom and does not give red ppt. with ammonical Cu2Cl2.
CH3 – C ≡ C – CH3 
No ppt.
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