The first ionisation potential will be maximum for

For an element,the values of $IP_1, IP_2, IP_3, IP_4$ and $IP_5$ are $7.1, 14.3, 34.5, 46.8$ and $162.2 \ eV$ respectively. Which of the following is the most likely element?

For elements $B$,$C$,$N$,$Li$,$Be$,$O$ and $F$,the correct order of first ionization enthalpy is:

Which among the following orders of second $IP$ (Ionization Potential) is correct?

Which of the following electronic configurations represents a sudden large gap between the values of second and third ionisation energies of an element?

Which ionisation potential $(IP)$ in the following equations involves the greatest amount of energy?