How many pairs are, in which first species has lower ionisation enegy – InterviewSolution

1.	How many pairs are, in which first species has lower ionisation enegy than second species: (i) N and O (ii) Br and K (iii) Be and B (iv) I and I^(-) (V) Li and Li^(+) (vi) and O and S (vii) Ba and Sr.
Answer» SOLUTION :(V) `LI lt Li^(+)` (VII) `Ba lt SR`

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