A) \[C{{H}_{3}}COC{{H}_{3}}\]
B) \[C{{H}_{3}}C{{H}_{2}}CHO\]
C) HCHO
D) \[C{{H}_{3}}CHO\]
Correct Answer: C
Solution :
Aldol condensation is shown by only those carbonyl compounds which have\[\alpha -\]hydrogen atoms. \[\underset{(a)}{\mathop{\overset{\alpha }{\mathop{C}}\,{{H}_{3}}-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-\overset{\alpha }{\mathop{C}}\,{{H}_{3}}}}\,\]\[\underset{(b)}{\mathop{C{{H}_{3}}\overset{\alpha }{\mathop{C}}\,{{H}_{2}}CHO}}\,\]\[\underset{(d)}{\mathop{\overset{\alpha }{\mathop{C}}\,{{H}_{3}}CHO}}\,\] Thus, compounds given in choice , and would undergo aldol condensation because they have\[\alpha -\]hydrogen atoms. \[H\overset{\begin{smallmatrix} O \\ |\,| \end{smallmatrix}}{\mathop{C}}\,H,\]however, will not give aldol condensation because it does not have\[\alpha -\]hydrogen atom.
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