Hydrocarbons Question 277
Question: Identify the reagent from the following list which can easily distinguish between 1-butyne and 2-butyne
Options:
A) bromine, $ CCl_4 $
B) $ H_2 $ , Lindlar catalyst
C) dilute $ H_2SO_4 $ , $ HgSO_4 $
D) ammonical $ Cu_2Cl_2 $ solution
Show Answer
Answer:
Correct Answer: D
Solution:
[d] Ammonical cuprous chloride gives precipitate (red) only with terminal alkynes, i.e.
alkynes having acidic hydrogen atom, such as butyne-1 $ (CH\equiv CCH_2CH_3) $
BETA
