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What is the correct order of `2^(nd)` ionisation energy ?A. `F lt N lt C lt O`B. `N lt C lt F lt O`C. `C lt N lt F lt O`D. `O lt C lt F lt N` |
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Answer» Correct Answer - B What is the correct order ………….. After removal of one electron : `{:(C^(+):1s^(2)2s^(2)2p^(1), , , N^(+)1s^(2)2s^(2)2p^(2)),(O^(+):1s^(2)2s^(2)2p^(3), , , F^(+): 1s^(2)2s^(2)2p^(4)):}` Remioval of second electron will requie maximum energy in case of O because of its half filed electronic configuration after removal of one electron. `:.` increaseing order of 2nd ionisation enthalpy : `C lt N lt F lt O` |
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