Question
  1. Define the term functional group. Identify the functional group present in

  1. $\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }{\text{O}}\\ \text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\parallel\\ \text{H}\text{ }- \text{C}\text{ }-\text{H}\text{ }$

  2. $\ \ \ \ \ \ \ \ \text{H}\ \ \ \ \ \text{OH} \\ \ \ \ \ \ \ \ \ \ \text{|} \ \ \ \ \ \ \ \text{|} \\ \text{H}-\text{C}-\text{C}=\text{O}\\ \ \ \ \ \ \ \ \ \ \text{|} \\ \ \ \ \ \ \ \ \ \text{H}$

  1. What happens when 5% alkaline KMnO4 solution is added drop by drop to warm ethanol taken in a test tube? State the role of alkaline KMnO4 solution in this reaction.

Answer

  1. The functional group is defined as an atom or group of atoms joined in a specific manner, which gives the chemical properties of the organic compound and are the centers for chemical reactivity.
  1. Aldehyde group.
  2. Carboxylic acid.
  1. The KMNO4 turns to green K2MNO4 which then again gets converted to MNo2 which discharges brown colour which serves as the test for unsaturation for ethane.

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