The organic compound that gives following qualitative analysis is :
Test Inference (a) Dil. HCl Insoluble (b) NaOH solution soluble (c) \(\mathrm{Br_2}\)/water Decolourization
| Test | Inference | |
| (a) | Dil. HCl | Insoluble |
| (b) | NaOH solution | soluble |
| (c) | \(\mathrm{Br_2}\)/water | Decolourization |
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The Correct Option is A
Solution and Explanation
Test (b): soluble in NaOH, so it is acidic enough to form a salt: phenol (\(pK_a\approx10\)) forms sodium phenoxide; cyclohexanol is not acidic enough and does not dissolve.
Test (c): decolourises bromine water: phenol is highly activated and gives 2,4,6-tribromophenol (white ppt, bromine colour discharged).
The compound is phenol, option (1) (the first structure, benzene ring bearing OH).
Answer: (1) phenol
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