Find the highest ratio of $IP$ values of the given pair of elements.

The correct order of $2^{nd}$ ionisation potential of carbon,nitrogen,oxygen and fluorine is

Given below are two statements $:$
Statement $(I) :$ The first ionisation enthalpy of group $14$ elements is higher than the corresponding elements of group $13.$
Statement $(II) :$ Melting points and boiling points of group $13$ elements are in general much higher than those of the corresponding elements of group $14.$ In the light of the above statements,choose the most appropriate answer from the options given below $:$

The ionisation energy of nitrogen is more than that of oxygen because :-

Which of the following elements are at the peaks of the ionization energy trend?

Which one of the following statements is incorrect in relation to ionisation enthalpy?