Bihar BoardEnglish MediumSTD 12 ScienceChemistryAlcohols, Phenols and Ethers2 Marks
Question
Write any two differences between $ CH_{3}OH $ and $ C_{2}H_{5}OH $
✓
Answer
(a) Ethyl alcohol $\left( C _2 H _5 OH \right)$ gives positive iodoform test. Yellow precipitate of iodoform is obtained when $C _2 H _5 OH$ is treated with $I _2$ and NaOH while $CH _3 OH$ does not give iodoform test. (b) When hot Cu wire is dipped in $CH _3 OH$, formaldehyde with characteristic pungent smell is obtained, $C _2 H _5 OH$ does not give formaldehyde.
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