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  • increasing ionisation enthalpy follows the order B<C<O<N BUT B should have high ionisation enthaly bcoz of half filled p-orbital

Increasing ionisation enthalpy follows the order: B<C<O<N 

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\\\text{Order of increasing ionisation: }B < C < O < N

Electronic configuration:

B - 1s^2,2s^2, 2p^1,    C - 1s^2,2s^2, 2p^2

N - 1s^2,2s^2, 2p^3,    O - 1s^2,2s^2, 2p^4

Stability order of the orbitals with electrons

2p^6 > 2p^5(\textup{due\;to\;F})>2p^3>2p^4>2p^2> 2s^2>2p^1 > 2s^1

Fully Filled > Half Filled > Partially Filled

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lovekush

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