PRACTICALS

PRACTICALS S.no Experiment Observation Inference Preliminary tests Odour: Note the odour of the organic compound. (i) Fish odour (ii) Bitter almond odour (iii) Phenolic odour (iv) Pleasant fruity odour (i) May be an amine (ii) May be benzaldehyde (iii) May be phenol (iv) May be an ester Test with litmus paper: Touch the moist litmus paper with an organic compound. (i) Blue litmus turns red (ii) Red litmus turns blue (iii) No colour change is noted (i) May be a carboxylic acid or phenol (ii) May be an amine (iii) Absence of carboxylic acid , phenol and amine Action with sodium bicarbonate: Take ml of saturated sodium bi carbonate solution in a test tube. Add or drops (or a pinch of solid) of an organic compound to it. (i) Brisk effervescence (ii) No brisk effervescence (i) Presence of a carboxylic acid. (ii) Absence of a carboxylic acid. Action with Borsche’s reagent: Take a small amount of an organic compound in a test tube. Add ml of Borsche’s reagent, ml of Conc HCl to it, then warm the mixture gently and cool it. Yellow or orange or red precipitate is formed Presence of an aldehyde or ketone