40. Is ionization enthalpy of an atom is equal to electron gain enthalpy of cation,if yes then why?

Q. Ionisation enthalpy of an atom is equal to :-
1. Electron gain enthalpy of the cation.
2. Electronegativity of the ion.
3. Ionisation enthalpy of the cation.
4. Electron gain enthalpy of anion.

Q. If the ionization enthalpy and electron gain enthalpy of an element are $275$ and $86Kcalm$ respectively, then the electronegativity of the element on the Pauling scale is:

Q. What is the significance of the terms 'isolated gaseous atom' and 'ground state' while defining the ionization enthalpy and electron gain enthalpy?

Q. In each of the following pairs,state which atom/ion has higher ionization enthalpy and more negative electron gain enthalpy?