Teaching UP PGT Mock Test Series 2024 Chemistry Structure of Atom Atomic Structure

If EA1 and EA2 for oxygen atom are -142 kJ mol-1 and +844 kJ mol-1. The energy released to form 2O + 2e- → 2O- will be: (in kJ mol-1)

1
986
2
702
3
284
4
1688
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