(A) $(i) 2C_6H_5COOH + 2Na \rightarrow 2C_6H_5COO^-Na^+ + H_2 \uparrow$
$(ii) C_6H_5COOH + NaOH \rightarrow C_6H_5COO^-Na^+ + H_2O$
$(iii) C_6H_5COOH + NaHCO_3 \rightarrow C_6H_5COO^-Na^+ + H_2O + CO_2 \uparrow$
$(iv) 2C_6H_5COOH \xrightarrow{P_2O_5/\Delta} (C_6H_5CO)_2O + H_2O$
$(v) C_6H_5COOH + PCl_5 \rightarrow C_6H_5COCl + POCl_3 + HCl$
$(vi) 3C_6H_5COOH + PCl_3 \rightarrow 3C_6H_5COCl + H_3PO_3$
$(vii) C_6H_5COOH + SOCl_2 \rightarrow C_6H_5COCl + SO_2 + HCl$
$(viii) C_6H_5COOH + NH_3 \rightarrow C_6H_5COONH_4 \xrightarrow{\Delta, -H_2O} C_6H_5CONH_2$
$(ix) C_6H_5COOH \xrightarrow{LiAlH_4/\text{ether}} C_6H_5CH_2OH$
$(x) C_6H_5COOH + NaOH/CaO \xrightarrow{\Delta} C_6H_6 + Na_2CO_3$
$(xi) C_6H_5COOH \xrightarrow{\text{conc. } HNO_3/H_2SO_4, \Delta} m\text{-$\text{नाइट्रोबेन्ज़ोइक एसिड}$}$
$(xii) C_6H_5COOH \xrightarrow{Br_2/FeBr_3} m\text{-$\text{ब्रोमोबेन्ज़ोइक एसिड}$}$
$(xiii) C_6H_5COOH \xrightarrow{\text{Oleum}, \Delta} m\text{-$\text{सल्फोबेन्ज़ोइक एसिड}$}$