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Question

IE1 of O<IE1 of N but IE2 of O>IE2 of N- Explain

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Solution

2nd I.E of oxygen is more than that of nitrogen because it attains stable half filled p orbital configuration where as nitrogen is left with only 2 electrons in its porbital, so it is easier to remove an electron from nitrogen than from oxygen thus oxygen has a greater ionization enthalpy.

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