Which of the following does NOT give yellow precipitate when reacted with…

Which of the following does NOT give yellow precipitate when reacted with $\left(\mathrm{NaOH}+\mathrm{I}_{2}\right)$ mixture?
  1. Acetophenone
  2. Benzaldehyde
  3. Acetone
  4. Acetaldehyde

Solution

Acetaldehyde, acetone and methyl ketones having $\mathrm{CH}_{3} \mathrm{CO}-$ group undergo haloform reaction. (Benzaladehyde $\rightarrow$ Absence of $\mathrm{CH}_{3} \mathrm{CO}-$ group)

Asked in: MHT CET 2020 (15 Oct Shift 2)

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