What is the correct order of successive ionization enthalpies?
A
IEIII>IEII>IEI
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B
IEI>IEII>IEIII
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C
IEII>IEI>IEIII
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D
IEIII>IEI>IEII
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Solution
The correct option is BIEIII>IEII>IEI The ionization energy of a multivalent atom increases with a consecutive removal of an electron. This is due to an increase in effective nuclear charge on the valence electron that makes it difficult to ionize a cation.