question_answer

Oxidation of acetaldehyde with selenium dioxide produces

A)  ethanoic acid    

B)  methanoic acid

C)  glyoxal        

D)  oxalic acid

Correct Answer: C

Solution :

                \[Se{{O}_{2}}\] converts \[-C{{H}_{2}}\] group adjacent to the carbonyl group into  group. \[\underset{acetaldehyde}{\mathop{\overset{HC{{H}_{2}}}{\mathop{\underset{CHO}{\mathop{|}}\,}}\,}}\,\xrightarrow{Se{{O}_{2}}}\underset{glyoxal}{\mathop{\overset{CHO}{\mathop{\underset{CHO}{\mathop{|}}\,}}\,}}\,\]