Question 3.37 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 removal of electron from core noble gas configuration.
(c) End of valence electrons is marked by a big jump in ionization enthalpy.
(d) Removal of electron from orbitals bearing lower n value is easier than from orbital having higher n value.
Class XI Classification of Elements and Periodicity in Properties Page 95
Answers
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ionisation energy increases for each successive electrons .
example :- Mg ,
1st ionisation energy { lose of first electron of outer shell } I.E1 < 2nd ionisation energy { lose of 2nd electron of outer shell after removing first electron } hence, (a) is correct.
ionisation energy be highest in Noble gases. due to full fill outer shell in Noble gas. hence, (b) is correct.
end of valance electrons is marked by a big jump in ionisation enthalpy. it's correct because valance electrons is the electrons which are free in atom. hence, energy required to lose valance electrons is lower than energy required to lose inner electron .
hence, when ionisation energy is very high comparatively then it means atom lost whole valance electrons. e.g., end of valance electrons.hence, option (c ) is correct.
removal of election from orbitals bearing lower n value is easier than from orbital having higher n value. it's wrong statement.
it will be difficult in place of easier.
hence, option (d) is answer
example :- Mg ,
1st ionisation energy { lose of first electron of outer shell } I.E1 < 2nd ionisation energy { lose of 2nd electron of outer shell after removing first electron } hence, (a) is correct.
ionisation energy be highest in Noble gases. due to full fill outer shell in Noble gas. hence, (b) is correct.
end of valance electrons is marked by a big jump in ionisation enthalpy. it's correct because valance electrons is the electrons which are free in atom. hence, energy required to lose valance electrons is lower than energy required to lose inner electron .
hence, when ionisation energy is very high comparatively then it means atom lost whole valance electrons. e.g., end of valance electrons.hence, option (c ) is correct.
removal of election from orbitals bearing lower n value is easier than from orbital having higher n value. it's wrong statement.
it will be difficult in place of easier.
hence, option (d) is answer
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3
Answer:
Orbitals bearing lower value of n will be more closer to the nucleus and thus electrons will experience greater attraction from nucleus and so its removal will be difficult not easier.
Thus statement given in option D is incorrect.
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