Find out number of compounds which are more acidic than benzoic acid, from following

4 compounds

Given Compounds:

1. Formic Acid (HCOOH):
   • Has no benzene ring and is simpler than benzoic acid. Its acidity is stronger because the absence of additional substituents minimizes steric and electronic effects.
   • More acidic than benzoic acid.
2. Oxalic Acid (H₂C₂O₄):
   • A dicarboxylic acid. Its second carboxylic group enhances the electron-withdrawing effect, stabilizing the conjugate base.
   • More acidic than benzoic acid.
3. p-Toluic Acid (COOH with CH₃ group):
   • The methyl group (CH₃) is an electron-donating group (EDG), which decreases the acidity of the molecule.
   • Less acidic than benzoic acid.
4. p-Nitrobenzoic Acid (COOH with NO₂ group):
   • The nitro group (NO₂) is a strong electron-withdrawing group (EWG), significantly increasing acidity by stabilizing the conjugate base.
   • More acidic than benzoic acid.
5. p-Dimethylaminobenzoic Acid (COOH with N(CH₃)₂ group):
   • The dimethylamino group (N(CH₃)₂) is a strong electron-donating group (EDG), which decreases acidity by destabilizing the conjugate base.
   • Less acidic than benzoic acid.
6. p-Trifluoromethylbenzoic Acid (COOH with CF₃ group):
   • The trifluoromethyl group (CF₃) is a strong electron-withdrawing group (EWG), significantly increasing acidity by stabilizing the conjugate base.
   • More acidic than benzoic acid.

Compounds more acidic than benzoic acid are:

1. Formic Acid
2. Oxalic Acid
3. p-Nitrobenzoic Acid
4. p-Trifluoromethylbenzoic Acid

4 compounds are more acidic than benzoic acid.