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Alcohols as Nucleophiles and Electrophiles

how to distin...

Question

how to distinguish between ethanol and methanol?

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Solution

Ethanol gives iodoform test whereas methanol does not give iodoform test.
NaOH,I₂
CH₃CH₂OH + NaOI â†’ CH₃CHO + NaI + H₂O
CH₃CHO + 3 NaOI â†’ CHI₃ + HCOONa + 2 NaOH.

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