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The compounds that produce CO2 with aqueous NaHCO3 solution are : A. C6H5CO2H B. C6H5OH C. 2,4-dinitrophenol (benzene ring with OH and two NO2 groups) D. cyclohexane-1-carboxylic acid E. H3CO–C6H4–OH (methoxyphenol) Choose the correct answer from the options given below :

1. A and C only
2. A, B and E only
3. A, C and D only
4. A and B only

Correct answer: A, C and D only

Solution

Options A (benzoic acid) and C (2,4-dinitrophenol) can react with sodium bicarbonate to produce carbon dioxide due to their acidic protons, which can deprotonate and release CO2. Option D (cyclohexane-1-carboxylic acid) also has a carboxylic acid group that reacts similarly, making A, C, and D the correct choices.

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