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NEET levelSingle correct optionDifficulty 1 of 3co235

The compound shown is warmed with iodine and aqueous NaOH. What is observed?

  1. AA silver mirror
  2. BA pale yellow precipitate of iodoform
  3. CA brick-red precipitate of cuprous oxide
  4. DNo visible change

Answer: B

The drawn compound is butan-2-ol, a CH3CH(OH)R alcohol. NaOI oxidises it to butanone, a methyl ketone, which undergoes the haloform reaction to give yellow CHI3 and sodium propanoate.
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