question_answer

A compound (X) on ozonolysis followed by reduction gives an aldehyde \[{{C}_{2}}{{H}_{4}}O\] and 2-butanone, compound (X) is

A)  3-methyl pentene-2

B)  3-methyl pentene-3

C)  3-methyl hexene-3

D)  3-ethyl pentene-3

Correct Answer: A

Solution :

\[X\xrightarrow[II.\,\,Zn/AcOH]{I.\,{{O}_{3}}}\underset{aldehyde}{\mathop{{{C}_{2}}{{H}_{4}}O}}\,+\underset{2-\text{butanone}}{\mathop{C{{H}_{3}}C{{H}_{2}}COC{{H}_{3}}}}\,\] The aldehyde should be \[C{{H}_{3}}CHO\] because the molecular formula is \[{{C}_{2}}{{H}_{4}}O\]