Hydrocarbons Question 278
Question: An unknown compound A has a molecular formula $ C_2H_6 $ , when A is treated with an excess of $ Br_2 $ , a new substance B with formula $ C_4H_6Br_2 $ is formed. A forms a white precipitate with ammonical silver nitrate solution. A may be
Options:
A) Butyne-1 is an incorrect name. The correct name is 1-butyne.
B) But-2-yne
C) Butene-1
D) Butene-2
Show Answer
Answer:
Correct Answer: A
Solution:
Conversion of $ C_4H_6 $ to $ C_4H_6Br_2 $ indicates that the compound is either but-1-yne or but-2-yne.
However, white precipitate with ammonical silver nitrate solution indicates that it is a terminal alkyne, i.e. a compound with a triple bond at the end of the carbon chain.
butyne-1 and not butyne-2
BETA
