Which one of the following statements is incorrect in relation to ionization enthalpy? (a) Ionization enthalpy increases for each successive electron. (b) The greatest increase in ionization enthalpy is experienced on the removal of an electron from core noble gas configuration. (c) End of valence electrons is marked by a big jump in ionization enthalpy. (d) Removal of an electron from orbitals bearing lower n value is easier than from orbital having higher n value
Which one of the following statements is incorrect in relation to ionization enthalpy? (a) Ionization enthalpy increases for each successive electron. (b) The greatest increase in ionization enthalpy is experienced on the removal of an electron from core noble gas configuration. (c) End of valence electrons is marked by a big jump in ionization enthalpy. (d) Removal of an electron from orbitals bearing lower n value is easier than from orbital having higher n value

Answer: (d) is false statement 

When comparing orbitals with lower value of ‘n’ to orbitals with higher value of ‘n,’ it is easier to remove an electron from the lower value of ‘n’ orbital.
Because the electrons of orbitals with lower value of ‘n’ are more strongly attracted to the nucleus than the electrons of orbitals with higher value of ‘n,’ the electrons of orbitals with lower value of ‘n’ are more strongly attracted to the nucleus.