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Carboxylic acids dissolve in NaHCO3 and evolve CO2 gas but phenols do not.

1. Carboxylic acids dissolve in NaHCO3 and evolve CO2 gas but phenols do not.
2. Phenols dissolve in NaHCO3 and evolve CO2 gas but carboxylic acids do not.
3. Both carboxylic acids and phenols dissolve in NaHCO3 and evolve CO2 gas.
4. Neither carboxylic acids nor phenols dissolve in NaHCO3 and evolve CO2 gas.

Correct answer: Carboxylic acids dissolve in NaHCO3 and evolve CO2 gas but phenols do not.

Solution

Carboxylic acids react with NaHCO3 to form a salt, water, and CO2 gas due to their stronger acidity compared to phenols, which do not react with NaHCO3.

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