(ii) Fehling’s test: Fehling reagent comprises of two solutions,
Fehling solution A and Fehling solution B Fehling solution A is
aqueous copper sulphate and Fehling solution B is alkaline
sodium potassium tartarate (Rochelle salt) These two solutions
are mixed in equal amounts before test On heating an aldehyde
with Fehling’s reagent, a reddish brown precipitate is obtained