Question:

The major organic compound formed by the reaction of 1, 1, 1 - trichloroethane with silver powder is :

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Silver powder dehalogenates a gem-trihalide (Wurtz-type coupling) to give an alkyne with twice the carbon skeleton.
Updated On: Nov 11, 2026
  • Acetylene
  • Ethene
  • 2 - Butyne
  • 2 - Butene
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The Correct Option is C

Solution and Explanation

1,1,1-Trichloroethane is \(\mathrm{CH_3-CCl_3}\).
Heated with Ag powder, the chlorine is abstracted as AgCl: \(\mathrm{2\,CH_3CCl_3 + 6\,Ag \rightarrow CH_3-C\equiv C-CH_3 + 6\,AgCl}\).
Two \(\mathrm{CH_3C}\) units join through a triple bond, i.e. 2-butyne.
Answer: (3) 2 - Butyne
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