question_answer

Three products are obtained by the ozonolysis of penta-1, 3-diene. Out of these if two products are formaldehyde and acetaldehyde, the name of the third one is

A) formaldehyde                  

B) ethanol

C) glyoxal                                 

D) propanaldehyde

Correct Answer: C

Solution :

\[\text{C}{{\text{H}}_{2}}=CH-CH=CH-C{{H}_{3}}\xrightarrow{{{O}_{3}}}\] \[\xrightarrow{Zn/{{H}_{2}}O}\underset{\text{formaldehyde}}{\mathop{HCHO}}\,+\underset{\begin{smallmatrix}  CHO \\  \text{glyoxal} \end{smallmatrix}}{\mathop{\underset{|}{\mathop{C}}\,}}\,HO+\underset{\text{acetaldehyde}}{\mathop{C{{H}_{3}}CHO}}\,\]