Which inorganic reagent may be used to distinguish between phenol and methanol:
Correct answer: B. K2Cr2O7 in dil. H2SO4
- A. Alkaline aqueous I2
- B. K2Cr2O7 in dil. H2SO4
- C. Aqueous NaHCO3
- D. Na metal
Explanation
Methanol gets oxidized by acidified K2Cr2O7 but phenol does not.
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About Alcohols and Phenols
Alcohols are classified as primary, secondary or tertiary and studied through their hydrogen bonding, acidity, oxidation and reactions with active metals, acids and halogenating agents. Phenols require separate treatment because the hydroxyl group is attached to an aromatic ring, making their acidity and electrophilic substitution different from ordinary alcohols.
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