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Bond order of N 2 + and N 2 - are same. Which relation is correct for N 2 + and N 2 - ?

Options

  1. ABond energy of N 2 + = bond energy of N 2 -
  2. BBond energy of N 2 + > bond energy of N 2 -
  3. CBond energy of N 2 + < bond energy of N 2 -
  4. DBond energy of N 2 + ≥ bond energy of N 2 -

Correct answer

B. Bond energy of N 2 + > bond energy of N 2 -

Step-by-step solution

By MOT, the bond orders of both are 2.5. Now acc to MOT only, the compound having more electrons in antibonding orbitals will form a weaker bond and a longer bond. If their bond orders are equal. N 2 - has 5 e - in antibonding while N 2 + has 4. So, N 2 + will make a stronger bond and will have a shorter bond length.

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