Q. When acetaldehyde is heated with Fehling solution, a red precipitate is formed. Which of the following is that?
A) $Cu_{2}O$
B) $Cu$
C) $CuO$
D) $CuSO_{4}$
Explanation
(a)
When acetaldehyde is heated with Fehling solution, a red precipitate of $Cu_{2}O\$ is obtained,
$CH_{3}CHO + 2Cu(OH)_{2} + NaOH \rightarrow CH_{3}.COONa + Cu_{2}O \downarrow + 3H_{2}O$
red
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.