Question

\[\begin{array}{cc}
\ce{A - C = O}\\
|\\
\ce{B}
\end{array}\]

where C stands for carbon, O for oxygen, А for hydrogen and B for ethyl group.

Answer 1

The carbon carries H, =O and −C₂H₅, so the group is −CHO (aldehyde) and the compound is propanal.