Test For Unsaturation

The unsaturated compounds (Alkenes and Alkynes) are recognized by their addition reaction.

  1. They turn bromine water from reddish-brown to colourless.
  2. They turn potassium tetraoxomanganate (vii) KMnO4 from purple to colourless. The most convenient test is with bromine water since reducing agents can slow the same test with potassium tetraoxomanganate (vii) KMnO4

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