MCQ
When acetaldehyde is heated with Fehling's solution, it gives a red ppt. of
- A$CuSO_4$
- B$CuO$
- C$Cu_2Cl_2$
- ✓$Cu_2O$
✓
Answer
Correct option: D.
$Cu_2O$
d
Fehlings solution is a tartaric acid complex of cupric ions.
Fehlings solution is a tartaric acid complex of cupric ions.
When acetaldehyde is heated with Fehling's solution, it gives a red precipitate
of $Cu _2 O$
$CH _3 CHO +2 Cu ^{2+}+5 OH ^{-} \stackrel{\Delta}{\longrightarrow} CH _3 COO ^{-}+ Cu _2 O \downarrow+3 H _2 O$
Acetaldehyde is oxidized to acetate ion and cupric ions are reduced to cuprous oxide.
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