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

Identify the reagent from the following list which can easily distinguish between 1 -butyne and 2-butyne
  1. bromine, $\mathrm{CCl}_{4}$
  2. $\mathrm{H}_{2}$, Lindlar catalyst
  3. dilute $\mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{HgSO}_{4}$
  4. ammonical $\mathrm{Cu}_{2} \mathrm{Cl}_{2}$ solution

Solution

Ammonical cuprous chloride gives precipitate (red) only with terminal alkynes, i.e. alkynes having acidic hydrogen atom, such as butyne-1 $\left(\mathrm{CH} \equiv \mathrm{CCH}_{2} \mathrm{CH}_{3}ight)$ ^

Asked in: JEE-TOPICTESTS-CHEMISTRY

Practice more HYDROCARBONS questions on Aicharya