1.

Take about 3 ml of ethanol in a test tube and warm it gently in a water bathAdd 5% solution of alkaline potassium permanganate drop by drop to the solution does the colour of potassium permanganate persist when it is added initially ?why does the colour of potassium permanganate not disappear when excess is added?​

Answer»

No, the colour initially disappear and when added in excess, it again reappears.

Explanation:

  • The alkaline potassium permanganate is a very good oxidising agent.
  • This is the Bayer's reagent.
  • This reagent REACTS with a substance oxidising it, and itself gets reduced to MNO2.
  • The Manganese dioxide being colourless, gives no colour.
  • So as initially the permanganate is added, the solution oxidised ethanol to ETHANOIC acid and itself got reduced to manganese dioxide.
  • So, the solution became colourless.
  • When excess is added, all the ethanol is already oxidised.
  • So colour of reagent is seen again.

For more information about Bayer's reagent,

brainly.in/question/4308818

What is Baeyer's reagent? Give a TEST to distinguish between ethane ...

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Baeyer's reagent is used in the LABORATORY for - Brainly.in


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