Question

what
happens (given chemical equations):
i) Ethyne reacts with ammoniacal cuprous
chloride solution.
ii) Ethyne reacts with bydrogen in the
presence of Lindlar's catalyst?​

Answer 1

Answer:

(i).Reaction of ammoniacal cuprous chloride with acetylene gives but-1, 3-yne. When acetylene is passed through an ammonical solution of cuprous chloride, at room temperature, precipitates of cuprous acetylide (red) is formed

(ii).But-2-ene reacts with H_(2) in the presence of Lindlar's catalyst. ... The hydrogenation of alkynes in the presence of Lindlar's catalyst causes syn addition of hydrogen to take place, and the alkene that is formed from an alkene with an internal triple bond has the (Z) or cis configuration.

Answer 2

Answer:

• When ethyne is passed through an ammoniacal solution of copper(I) chloride, a red-brown precipitate of copper(I) acetylide is produced. Terminal alkynes also react to form a red-brown precipitate. ... You can, therefore, use this reaction to distinguish between terminal and non-terminal alkynes.
• The hydrogenation of alkynes in the presence of Lindlar's catalyst causes syn addition of hydrogen to take place, and the alkene that is formed from an alkene with an internal triple bond has the (Z) or cis configuration.