Which one can be used as test for phenol:
Correct answer: D. C6H5OH + Br2 (excess)
- A. C6H5OH + CH3COCI in the presence of aq. NaOH
- B. C6H5OH + HCHO in the presence of NaOH
- C. C6H5ONa++ CH3CH2 Br
- D. C6H5OH + Br2 (excess)
Explanation
Phenol can be tested by bromine water test, as it gives white ppt of 2,4,6 Tribromophenol. An aqueous solution of phenol reacts with bromine water to give white ppt. of 2,4,6- tribromophenol.
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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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