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Question

Choose the correct stability order of the given resonating structures :

A
C>B>A>D
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B
D>C>B>A
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C
A>B>C>D
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D
D>B>C>A
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Solution

The correct option is C A>B>C>D
Structure A and B have maximum number of covalent bonds as compared to structure C and D. So, A and B are more stable than C and D.
Between A and B ,
Structure A is more stable since it is neutral (no formal charges) and all atoms have a complete octet. So, A>B

Between C and D
In structure D the negative charge is on electropositive atom (carbon) and positive charge on electronegative atom (oxygen) making it the less stable than structure C. So, C>D

Correct order is A>B>C>D

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