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Question

The correct order of second ionization potential of carbon, nitrogen, oxygen and fluorine is:-


A

C > N > O > F

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B

O > N > F > C

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C

O > F > N > C

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D

F > O > N > C.

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Solution

The correct option is C

O > F > N > C


Second ionization potential of oxygen is more than that for fluorine, because second electron is removed from half-filled 2p-orbital of O+. So, the correct order of second ionization potential is O > F > N > C.


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