Question

Which reagent can be used to distinguish between 1-butyne and 2-butyne?

• A. alc.$KOH$
• B. $alc.KMn{O}_4$
• C. $B{r}_2$ water
• D. $A{g}^{+}$

Answer 1

The correct option is D $A{g}^{+}$

Ammonical silver nitrate is used to distinguish between end alkyne and other alkyne as it reacts with acidic hydrogen.
Only end alkyne have acidic hydrogen so it reacts with 1-butyne only.