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Select the incorrect statement(s).A. `IE_1` of nitrogen atom is less than `IE_1` of oxygen atomB. Electron gain enthalpy of oxygen is less negative than seleniumC. Electronegativity on pauling scale is 2.8 times the electronegativity on Mulliken scaleD. `Cr^(6+)` is smaller than `Cr^(3+)` |
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Answer» Correct Answer - A,C (A)IE (I) of N is more than O due to stable half filled electronic configuration of valence shell in N. (B)Electron gain enthalpy of O (-141 `"kJmol"^(-1)`) is less than sulphur and selenium due to its exceptionally small atomic size. (C )Electronegativity on Mulliken scale is 2.8 larger than electronegativity on Pauling scale. (D)The ionic radius decreases as more electrons are ionized off. `Cr^(6+)=44"pm",Cr^(3+)=61.5"pm"` |
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