HARDMCQ SINGLEJEE Mains ChemistryInorganic ChemistryPeriodic PropertiesAchiever Section

From which of the following species it is easiest to remove one electron?

A.O (g)

B.O₂– (g)✓ Correct

C.O⁺ (g)

D.O– (g)

Explanation

The order of their relative sizes will be 2 O O O O as more the positive charge smaller will be the size of the ion and greater the negative charge larger will be the size of the ion. Therefore, removal of one electron will be easiest from 2 O because of its larger size, smaller nuclear force and smaller ionization energy.

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