NEET 2012 Chemistry question

Which of the following reagents will be able to distinguish between 1-butyne and 2-butyne?

(1)
(2)Correct
(3)
(4)

Answer: (2)

Solution

1-Butyne is a terminal alkyne with an acidic hydrogen on the sp carbon, so it reacts with the strong base to form the sodium acetylide and : $HC≡C-C_2H_5 + NaNH_2 →

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Question ID VK-091000