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Will the formal charges of an atom in a ...

Will the formal charges of an atom in a molecule remain the same? Why or why not?

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No. the formal charge on an atom may not be same. It changes with the structural environment of the atom in the molecule. In resonance structures the electronic environment changes. Hence the formal charges also may change.
Example :`N_2 O` has the resonance structures

The formal charges in structure I were worked out earlier. In structure (II) the formal charges of `N_((1)) , N_((2))` and O are 0, +1 and -1 respectively.
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AAKASH SERIES-CHEMICAL BONDING-OBJECTIVE EXERCISE -3 (RECENT AIPMT/NEET QUESTIONS )
  1. Will the formal charges of an atom in a molecule remain the same? Why ...

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  2. In which of the following pairs, the two species are isostructural?

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  3. The correct order of increasing bond angles in the following triatomic...

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  4. In which of the following molecules/ions BF(3), NO(2),NH(2) and H(2)O ...

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  5. Four diatomic species are listed below in different sequencies. Which ...

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  6. According to MO theory which of the lists rank the nitrogen species in...

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  7. What is the dominant intermolecular force or bond that must be overcom...

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  8. In which of the following pairs of molecules/ ions, the central atoms ...

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  9. Which one of the folllowing species does not exist under normal condit...

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  10. In which one of the following species the central atom has the type of...

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  11. Some of the properties of the two species, NO(2)^(-) and H(3)O^(+) are...

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  12. In which of the following molecules the central atom does not have sp^...

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  13. Which of the following has the minimum bond length?

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  14. Which of the two ions from the list given below that have the geometry...

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  15. The correct order of increasing bond length of C-H, C-O, and C=C is

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  16. The pairs of species of oxygen and their magnetic behaviour are noted ...

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  17. Bond order of 1.5 is shown by

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  18. Which of the following species contains thre bond pairs and one Ione p...

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  19. The pair of species with the same bond order is

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  20. During change of O(2) to O(2)^(-) ion, the electron adds on which one ...

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  21. Four diatomic species are listed below. Identify the correct order in ...

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