General Tests on Benzoic Acid
(a) It dissolves in hot water but separates out in the form of white shining flakes on cooling.
(b) Benzoic Acid evolves CO2 with sodium bicarbonate, that is it gives effervescence with sodium carbonate.
(c) Neutral ferric chloride provides a buff coloured precipitate.
(d) When warmed with ethyl alcohol and a little conc. H2SO4, a fragrant odour of ethyl benzoate is acquired.
(e) While heated strongly along with soda lime, benzene vapours are evolved that are inflammable.