JEE Main2012ChemistryClassification of Elements and Periodicity in PropertiesActual
Which of the following presents the correct order of second ionization enthalpies of C , N , O and F ?
Options
- AF > O > N > C
- BO > N > F > C
- CC > N > O > F
- DO > F > N > C
Correct answer
D. O > F > N > C
Step-by-step solution
In a period the value of ionisation potential increases from left to right with breaks where the atoms have some what stable configuration. After removing an e⁻ oxygen will acquire stable configuration. Hence O ⁺ has highest second ionisation enthalpy than F ⁺ and N ⁺ . correct order is O > F > N > C