question_answer

Which of the following aldehyde contains \[\alpha -C\] atom but does not have any \[\alpha -H\] atom?

A) Propionaldehyde                            

B) Benzaldehyde                  

C) Isobutyraldehyde

D)                       Formaldehyde

Correct Answer: B

Solution :

The C-atom attached directly to the functional group is called \[\alpha \] C-atom and the hydrogen attached to it, is called \[\alpha -H\] atom. The structures of the given compounds are as          Thus, benzaldehyde is the compound thatcontains \[\alpha -C\] atom but no \[\alpha -H\] atom.