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Identify a reagent from the following li...

Identify a reagent from the following list which can easily distinguish between 1-butyne and 2-butyne.

A

bromine, `C Cl_(4)`

B

`H_(2)` Lindlar catalyst

C

dilute `H_(2)SO_(4),HgSO_(4)`

D

ammoniacal `Cu_(2)Cl_(2)` solution

Text Solution

Verified by Experts

The correct Answer is:
D
1-Butyne contains acetylinic hydrogen atom: It will form insoluble cuprous acetylides.
`CH_(3)-CH_(2)-C-=CH+CuCl+NH_(3)toCH_(3)-underset("Red ppt.")(CH_(2)-C)-=C-Cu+NH_(4)Cl`
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