alleryAn aldehyde heated with Fehling's reagent gives a brick red precipitate of:
AMetallic silver
BCopper(I) oxide
CCopper(II) oxide
DCopper(II) sulphide
Answer & Solution
Correct answer: B. Copper(I) oxide
The aldehyde reduces Cu2+ to Cu+, which precipitates as brick red copper(I) oxide.
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