To identify the functional group in the given organic compound-carboxylic acid

Aim : To identify the functional group in the given organic compound.

Material Required : Test tube, test tube stand, test tube holder, dropper, litmus (blue), NaHCO3, conc. H2SO4 , NH4OH, FeCl3

Physical Properties:

State: Solid 

Colour: White

Odor: Vinegar Like

Flammability: Burn with non-sooty flame (Aliphatic) 

Preliminary test :

S.N.	Experiment	Observation	Inference
1.	Litmus test: Organic compound + 2 drops of litmus solution.	Litmus solution turns from blue to red.	-COOH or – OH may be present
2.	Organic compound + NaHCO3 solution.	Colourless, odorless gas with brisk effervescence.	-COOH group may be or – OH (phenol group present.

Confirmatory test :

S.N.	Experiment	Observation	Inference
1.	Ester test: Organic compound + C2H5OH + conc. H2SO4 + Heat	Fruity smell of ester	-COOH group is confirmed
2.	FeCl3 Test: Organic compound + dil. FeCl3 solution	Red color appears	-COOH group is confirmed

 

Result : The functional group present in the given organic compound is carboxylic acid