Benzoic acid is non-water soluble

Answer 1

From the structure of benzoic acid, we can see that the phenyl substituent makes of most of the molecule, so we should expect it to be nonpolar with respect to water. However, if another molecule were to deprotonate the benzoic acid (ie. with a base like NaOCH3), its conjugate base -- which by the way is negatively charged -- will easily dissolve in water because it can form favorable interactions with water molecules.

Answer 2

It is not so soluble in water - only 2,9 g/L at r.m.

Answer 3

Yes, benzoic acid is sparingly soluble in water, with a solubility of around 3-6 g/L at room temperature. It is more soluble in organic solvents like alcohol and ether.