Question

Which of the following will not give iodoform test ?

• A. Ethanol
• B. Ethanal
• C. Isopropyl alcohol
• D. Benzyl alcohol

Answer 1

Answer: (D)

Any group having $C{H}_{3}CO$- group, along with ethanol and isopropyl alcohol would give iodoform test positive. This is because ethanol under reaction condition (oxidising) produces ethanal having $C{H}_{3}CO-$ group. Also any secondary alcohol having $C{H}_3-C-(OH)-$ group also produces a ketone having $C{H}_{3}C{O}^{-}$ group on oxidation