Question

Resonanace structure of CH2CHCHO

Answer 1

The resonance structures of CH2 = CH – CHO can be written as: Structure 1 is the most stable because each carbon and oxygen atom has an octet and no carbon or oxygen atom has a charge. In structure II, the negative charge on the more electronegative atom and a positive charge on the more electropositive atom.

Answer 2

Check the attachment for fig...
In structure one each of the compound each of the carbon have their octets filled up and there is no charge but in the second figured there is charge and therefore it is less stable