A) \[C{{u}_{2}}O\]
B) Cu
C) CuO
D) \[CuS{{O}_{4}}\]
Correct Answer: A
Solution :
When acetaldehyde is heated with Fehling solution, a red precipitate of \[C{{u}_{2}}O\]is obtained. \[\text{C}{{\text{H}}_{3}}CHO+2Cu{{(OH)}_{2}}+NaOH\xrightarrow{{}}\] \[C{{H}_{3}}COONa+\underset{(red)}{\mathop{C{{u}_{2}}O}}\,\downarrow +3{{H}_{2}}O\]
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