A) \[CuO\]
B) \[C{{u}_{2}}O\]
C) \[CuS{{O}_{4}}\]
D) \[Cu\]
Correct Answer: B
Solution :
Aliphatic aldehyde on heating with Fehling solution produces red precipitate of \[C{{u}_{2}}O\]. \[R-CHO+2Cu{{(OH)}_{2}}+NaOH\xrightarrow{{}}\] \[RCO{{O}^{-}}+N{{a}^{+}}+\underset{\operatorname{Re}d\,ppt.}{\mathop{C{{u}_{2}}O}}\,+3{{H}_{2}}O\]
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