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NEET2004ChemistryAldehydes and KetonesActual

Which one of the following will not form a yellow precipitate on heating with an alkaline solution of iodine?

Options

  1. ACH ₃ CH ( OH ) CH ₃
  2. BCH ₃ CH ₂ CH ( OH ) CH ₃
  3. CCH ₃ OH
  4. DCH ₃ CH ₂ OH

Correct answer

C. CH ₃ OH

Step-by-step solution

The carbonyl compounds which contains the CH ₃ CO - or the CH ₃ C ( H )( OH ) -compounds undergo the iodoform reaction. Benzyl alcohol, Methanol, Diethyl ketone, acetic acid do not give iodoform test. Caution Compounds that give positive Iodoform Test are Acetaldehyde, Methyl Ketone, Ethanol, Secondary Alcohols that contain methyl groups in alpha position.

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