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JEE MainChemistryAldehydes and Ketones

An unknown organic compound X is subjected to several qualitative tests with the following observations: (i) It decolorizes cold dilute alkaline KMnO ₄ solution (positive Baeyer's test). (ii) It gives a red color with Ceric ammonium nitrate solution. (iii) It does not restore the pink color of Schiff's reagent. (iv) It does not respond to the Phthalein dye test. Identify the compound X from the given options.

Options

  1. ACinnamaldehyde
  2. B2-Allylphenol
  3. C3-Phenylpropan-1-ol
  4. DCinnamyl alcohol

Correct answer

D. Cinnamyl alcohol

Step-by-step solution

Let us analyze the given qualitative test results for compound X: (i) Positive Baeyer's test indicates the presence of unsaturation (an alkene or alkyne group). (ii) Positive Ceric ammonium nitrate test indicates the presence of an alcoholic - OH group. (iii) Negative Schiff's test indicates the absence of an aldehyde group. (iv) Negative Phthalein dye test indicates the absence of a phenolic - OH group. Now, evaluating the given options: - Cinnamaldehyde contains an alkene and an aldehyde group. It would give a po

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