A) Ethanol
B) Methanal
C) Ethanal
D) Propanone
Correct Answer: C
Solution :
The compound which contains \[-COC{{H}_{3}}\] group in its structure, give positive iodoform test and the compound which contains \[-CHO\] group give positive Fehling test. In ethanal, \[C{{H}_{3}}CHO\] both the groups are present, hence it responds to both iodoform test and Fehlings test. \[C{{H}_{3}}CHO+{{I}_{2}}+NaOH\xrightarrow{{}}\underset{Iodofrom}{\mathop{CH{{I}_{3}}}}\,+NaI+{{H}_{2}}O\]\[C{{H}_{3}}CHO+\underset{\begin{smallmatrix} Fehlings \\ solution \end{smallmatrix}}{\mathop{Cu{{(OH)}_{2}}}}\,\xrightarrow{{}}C{{H}_{3}}COOH\] \[\underset{\operatorname{Re}d\,ppt.}{\mathop{+CuO}}\,\downarrow +2{{H}_{2}}O\]
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