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The correct order of second ionisation potential of carbon, nitrogen, oxygen and fluorine is
The correct order of second ionisation potential of carbon, nitrogen, oxygen and fluorine is
Updated On: Jun 14, 2022
- C > N > O > F
- O > N > F > C
- O > F > N > C
- F > O > N > C
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The Correct Option is C
Solution and Explanation
For second ionisation potential, electron will have to be removed from valence shell of the following ions: In general, ionisation energy increases from left to right in a period. However, exception occur between adjacent atoms in a period, greater amount energy is required for removal of electron from completely half-filled or completely filled orbital than the same for adjacent atom with either less than completely half-filled or less than completely filled orbital. Therefore, ionisation potential of $O^+$ is greater than that of F+. Also ionisation potential of $N^+$ is greater than $C^+$ but less than
both $O^+ \, and \, F^+$ (periodic trend). Hence, overall order is 2nd IP : O > F > N > C.
both $O^+ \, and \, F^+$ (periodic trend). Hence, overall order is 2nd IP : O > F > N > C.
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Concepts Used:
Haloalkanes and Haloarenes - Classification
Classification of Haloalkanes and Haloarenes are as follows:
Haloalkanes and Haloarenes are Classified on the Basis of the Number of Halogen Atoms:
These are further classified as mono, di, or polyhalogen (tri-,tetra-, etc.) compounds depending on whether they contain one, two or more halogen atoms in their structures. For example;
- Monohaloalkane
- Dihaloalkane
- Trihaloalkane
Haloalkanes and Haloarenes are Classified on Compounds Containing sp3 C—X Bond (X= F, Cl, Br, I)
This class includes:
- Alkyl halides or haloalkanes (R—X)
- Allylic halides
- Benzylic halides
Haloalkanes and Haloarenes are Classified on Compounds Containing sp2 C—X Bond
This class includes:
- Vinylic halides
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