1.

Give simple chemical test to distinguish between(i) Propanal and propanone (ii) Phenol and benzoic acid

Answer»

(i) Propanal and propanone 

CH3 CH2CHO + Ag2O ────→ CH3 CH2COOH + Ag (silver mirror) Propanal

CH3 COCH3 + Ag2O ────→ no reaction Propanone

(ii) Phenol and benzoic acid

i. Phenol does not give sodium carbonate test whereas benzoic acid give this test. 

ii. Phenol give azo dye test , benzoic acid does not.



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