12th Class Chemistry Alcohols, Phenols and Ethers / एल्कोहॉल, फीनॉल तथा ईथर Question Bank 12th CBSE Chemistry Alcohols, Phenols and Ethers

  • question_answer
    How will you distinguish between methanol and ethanol by colour test?

    Answer:

                    Ethanol gives a yellow precipitate of iodoform on warming with iodine and sodium carbonate while methanol fails to react. \[\underset{\text{Ethanol}}{\mathop{{{C}_{2}}{{H}_{5}}OH}}\,+4{{I}_{2}}+3N{{a}_{2}}C{{O}_{3}}\xrightarrow{warm}\]\[CH{{I}_{3}}+HCOONa+5NaI+2{{H}_{2}}O+3C{{O}_{2}}\]


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