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प्रश्न
Which of the following does not give iodoform test?
विकल्प
Ethanol
Ethanal
Propan-2-ol
Butan-1-ol
MCQ
उत्तर
Butan-1-ol
Explanation:
\[\ce{\underset{Ethanol}{CH3CH2OH} + 4I2 + 6NaOH ->[Δ] CHI3 + HCOONa + 5NaI + 5H2O}\]
\[\ce{CH3CHO + 3I2 + 4NaOH ->[Δ] HCOONa + CHI3 + 3NaI + 3H2O}\]
\[\begin{array}{cc}
\ce{OH}\phantom{........................................................}\\
|\phantom{..........................................................}\\
\ce{\underset{Propane-2-ol}{CH3 - CH - CH3} + 4I2 + 6NaOH ->[Δ] CHI3 + 5NaI + CH3COONa + 5H2O}
\end{array}\]
\[\ce{CH3 - CH2 - CH2 - CH2 - OH + I2 + NaOH -> No reaction}\]
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