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Which is the incorrect statement regarding resonance contributing structures?

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a
All contributing structures must have same number of valence electrons
b
All contributing structures must have same arrangement of atoms
c
All atoms in a contributing structures must have complete valence shells
d
Equivalent resonance structures have same potential energies

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detailed solution

Correct option is C

There may be an atom with incomplete valence shell in one or more contributing structure, e.g.Both I and II have a carbon atom with sextet of electrons while III has all its atoms with complete valence shell.

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