Carbonyl CompoundMedium

Question

Fehling's solution ' A ' is

Options

A.alkaline solution of sodium potassium tartrate (Rochelle's salt)

B.aqueous sodium citrate

C.aqueous copper sulphate

D.alkaline copper sulphate

Solution

Sol. [Key Concept: Composition of Fehling solutions]

Fehling solution A is aqueous copper(II) sulphate, option (3). Fehling solution B is alkaline sodium potassium tartrate, Rochelle salt. The tartrate complexes Cu²⁺ and helps keep it in solution when the two solutions are mixed under alkaline conditions.

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