An organic functional group which can likely decolorize ammoniacal silver nitrate is?

  • A alkene
  • B alkane
  • C alkyne
  • D alkanol

The correct answer is C. alkyne

Terminal alkynes react with Tollens reagent (ammoniacal silver nitrate solution) to form silver alkynides as a white precipitate, whereas internal alkynes do not react with Tollens reagent.

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