question_answer

Increasing reactivity order of nucleophilic addition reaction of \[H-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-H;C{{H}_{3}}-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-H\] and\[C{{H}_{3}}-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]will be

A)  \[HCHO>C{{H}_{3}}CHO>C{{H}_{3}}COC{{H}_{3}}\]

B)  \[C{{H}_{3}}CHO>HCHO>C{{H}_{3}}COC{{H}_{3}}\]

C)  \[C{{H}_{3}}COC{{H}_{3}}>C{{H}_{3}}CHO>HCHO\]

D)  \[C{{H}_{3}}CHO>C{{H}_{3}}COC{{H}_{3}}>HCHO\]

Correct Answer: A

Solution :

  Reactivity of nucleophilic addition reaction depends upon carboniumion. On increasing stability, reactivity decreases. Hence, decreasing order of reactivity is: \[+I\]effect of\[C{{H}_{3}}\]group decreases reactivity of .