(P) Pyrcuric acid = (CH3−CO−COOH) have carbonyl group i.e. show 2, 4 DNPtest. (Q) Aspirine is
& give CO2 gas with NaHCO3 (R) Acrylic acid = (CH3 - CH = CH - COOH) Due to π - bond , it declourise Br2 / CCl4 (Unsaturation test). (S) Benzyl alcohol is