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Lead Ion

The organic c...

Question

The organic compound, which gives a red precipitate with ammoniacal cuprous chloride and undergoes an addition reaction is:

A

ethane

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B

ethene

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C

ethyne

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D

ethanol

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Solution

The correct option is B ethyne
Reaction with ammonical cuprous chloride solution :- When acetylene is passed through ammonical cuprous chloride solution, a red precipitate of copper acetylide is formed.
$H - C \equiv C - H + C u_{2} C l_{2} + 2 N H_{4} O H \to C u - C \equiv C - C u c o p p e r a c e t y l i d e (R e d p p t) + 2 N H_{4} C l + 2 H_{2} O$

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