Question

Choose the correct statement for the following resonating structures :

• A. Structure I is more stable than structure II
• B. Structure I is less stable than structure II
• C. Structure I and structure II are equally stable.
• D. None of the above

Answer 1

The correct option is A Structure I is more stable than structure II

Rule for stability of resonating structures :
Negative charge on the more electronegative element and positive charge on more electropositive element is comparatively more stable.

In structure I, negative charge is on more electronegative element (oxygen) as compared to structure II where negative charge is on less electronegative element (carbon)
So, structure I is more stable than structure II