MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Organic ChemistryHydrocarbonsPhysical & Chemical Properties of Alkynes

Acetylene on treating with Cu2Cl2 gives

A.Cu2C2✓ Correct

B.CuCHCl

C.CH4

D.None of these

Explanation

Acetylene on reaction with cuprous chloride gives copper acetylide as product. This reaction is used to distinguish between terminal alkynes and alkenes. It gives red precipitate because the terminal hydrogens are replaced by copper atoms. The reaction is shown as follows: 2 2 CH CH Cu Cl Cu C C Cu ->

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