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Which of the following does not give effervescence with `NaHCO_(3)` ?
A. Phenol
B. p-Nitrophenol
C. 2,4-dinitrophenol
D. 2,4,6-trinitrophenol

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Correct Answer - A
`NaHCO_(3)` does not give effervescence with phenol. But ortho-para nitro phenols give effectivescence with `NaHCO_(3)`.

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