How many of the following molecule can give red precipitate when treated with ammnonical cuprouschloride. Propyne, Butyne-1, Butyne-2, Acetylene, pentyne-1, Pentyne-2 and Phenyl acetylene.

How many of the following molecule can give red precipitate when treat

1.	How many of the following molecule can give red precipitate when treated with ammnonical cuprouschloride. Propyne, Butyne-1, Butyne-2, Acetylene, pentyne-1, Pentyne-2 and Phenyl acetylene.
Answer» Solution :Terminal alkynes are ACIDIC in NATURE. Hence 1, 2, 4, 5 and 7