Question

2 nd ionization enthalpy is greater than first ionization enthalpy give reasons​

Answer 1

In neutral atom. The no.of electrons is equal to no. Of protons.. In unipositive ion no of protons is greater than no. Of electrons. Due nuclear attraction over valency electrons is more in unipositive ion.. Hence more energy is required to remove electrons in unipositive ion than neutral atom....

So. 2nd IE greater than 1st IE

Answer 2

second ionization enthalpy is greater than the first ionization because after removal of first electron the remaining electrons are held more firmly by the nucleus and thus the atom has greater nuclear charge which makes the removal of second electron difficult and thus greater ionization energy.