The correct order of C, N, O and F in terms of second ionisation potential is (A) F < N < C < O (B) — JEE Mains Chemistry Past Papers Chemistry Question
Question
The correct order of C, N, O and F in terms of second ionisation potential is (A) F < N < C < O (B) C < O < N < F (C) C < N < F < O (D) C < F < N < O
Answer: B
💡 Solution & Explanation
To compare second ionization potential configuration of mono-cation is observed C + N + O + F + [He] 2s 2sp [He] 2s 22p [He] 2s 22p Half-filled stable. [He] 2s 22p 2 nd IE order O > F > N > C
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