The incorrect statement among the following isa. The first ionization potential of A1 is less than the first ionization potential of Mgb. The second ionization potential of Mg is greater than the second ionization potential of Nac. The first ionization potential of Na is less than the first ionization potential of Mgd. The third ionization potential of Mg is greater than third ionization potential of Na

Sol. (a) Correct statement : In a period, element of 2ndgroup ahs higher first ionization potential than element group of 13. (b) Incorrect statement : Mg+ required less energy for further ionization than Na+ because of noble gas configuration of Na+. (c) Correct statement : Ionization energy increases from left to right in a period. (d) Correct statement : Mg2+ has noble gas configuration, require greater energy for further ionization than Na2+.