Distinguishing Test of Terminal and Non Terminal Alkynes
Identify a re...
Question
Identify a reagent from the following list which can easily distinguish between 1-butyne and 2-butyne.
A
Br2, CCl4
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B
H2,Pd,BaSO4
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C
Dilute H2SO4, HgSO4
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D
[Ag(NH3)2]NO3
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Solution
The correct option is D[Ag(NH3)2]NO3 Only terminal alkynes (but-1-yne) react with ammoniacal solution of silver nitrate (AgNO3) or cuprous chloride (CuCl). CH3−CH2−C≡CH+2[Ag(NH3)2]NO3→CH3−CH2−C≡C−Ag+white ppt
CH3−C≡C−CH3+2[Ag(NH3)2]NO3→No reaction Hence correct option is d.