Hydrocarbons - Result Question 53
####55. Which of the following reagents will be able to distinguish between 1-butyne and 2-butyne?
(a) $NaNH_2$
(b) $HCl$
(c) $O_2$
(d) $Br_2$
[2012 M]
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Solution:
- (a) 1-Butyne and 2-butyne are distinguished by $NaNH_2$ because 1-Butyne react with $NaNH_2$ due to presence of terminal hydrogen.
$ \begin{aligned} & \underset{\text{ 1-Butyne }}{CH_3-CH_2-C \equiv CH+NaNH_2} \\ & \longrightarrow CH_3 CH_2-C \equiv CNa+NH_3 \end{aligned} $
