When sodium benzoate (NaC₇H₅O₂) reacts with ammonium chloride (NH₄Cl), benzoic acid (C₇H₆O₂) is formed.

Here's why:

* Sodium benzoate is the sodium salt of benzoic acid.

* Ammonium chloride is a source of hydrogen ions (H+).

The reaction proceeds as a double displacement reaction:

NaC₇H₅O₂ (aq) + NH₄Cl (aq) → C₇H₆O₂ (s) + NaCl (aq) + NH₃ (aq)

Benzoic acid is less soluble in water than sodium benzoate, so it precipitates out of the solution.