question_answer

\[\overset{\centerdot \,\,\,\centerdot }{\mathop{C{{H}_{2}}}}\,-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]and\[C{{H}_{2}}=\underset{\begin{smallmatrix}  || \\  :O:  \\  \,\centerdot \,\,\centerdot  \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]

A)  resonating structures

B)  tautomers

C)  geometrical isomers

D)  optical isomers

Correct Answer: A

Solution :

Structure I and structure II are the resonating forms because of the position of atoms remains the same and only electron redistribution takes place.