question_answer

Based on the following reaction identify alkene\[A\] \[A\xrightarrow{{{O}_{3}}/({{H}_{2}}O)/Zn}2HCHO+\underset{\begin{smallmatrix}  | \\  CHO \end{smallmatrix}}{\mathop{CHO}}\,\]

A) \[C{{H}_{3}}-\overset{\begin{smallmatrix}  C{{H}_{2}} \\  || \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]

B) \[C{{H}_{2}}=CH-CH=C{{H}_{2}}\]

C) \[C{{H}_{3}}-CH=CH-C{{H}_{3}}\]

D) \[C{{H}_{3}}-C{{H}_{2}}-CH=C{{H}_{2}}\]

Correct Answer: B

Solution :

Alkene\[A\]is\[C{{H}_{2}}=CH-CH=C{{H}_{2}}\] \[C{{H}_{2}}=CH-CH=C{{H}_{2}}+{{O}_{3}}\xrightarrow{{}}\]