Amongst the following, total number of compounds soluble in sodium bicarbonate are : 

2, 4, 6-trinitrophenol, benzoic acid, salicylic acid, Oxalic acid, acetic anhydride, ethanol, acetamide, benzene sulphonic acid, Ethanoic acid, Acetone.

Five compounds, i.e., 2, 4, 6-trinitrophenol, benzoic acid, salicylic acid, oxalic acid, acetic anhydride, ethanoic acid and benzene sulphonic acid decompose ${\mathrm{NaHCO}}_3$ and hence dissolve in it.  Note that acetic anhydride undergoes hydrolysis to give two moles of acetic acid , which will react with bicarbonate.