TOLLEN'S TEST :
1- Tollen's reagent are Ammoniated Silver Nitrate.
2- Reaction with Aliphatic and Aromatic aldehyde only.
3- ketones do not react. Because ketones react with tollen's reagent don't form silver mirror.
4- Tollen's reagent is a strong mild oxidizer.
5- Tollen's test produce a silver mirror. So,
It is also called Silver mirror test.
FEHLING'S TEST :
1- Fehling's reagent comprises of two solution aq. Copper sulphate and Sodium Pottasium Tartarate (Rochelle salt).
2- Reaction with Aliphatic aldehyde only.
3- Aromatic aldehyde and ketones do not react.
4- When fehling's reagent react aliphatic aldehyde give a raddish brown precipitate.
5- Fehling's reagent are mild oxidizer.