Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
Highly selective Backlog Qs for JEE MainChemistryClassification of Elements and Periodicity in Properties

The incorrect statement among the following is

Options

  1. AThe first ionization potential of Al is less than the first ionization potential of Mg .
  2. BThe second ionization potential of Mg is greater than the second ionization potential of Na .
  3. CThe first ionization potential of Na is less than the first ionization potential of Mg .
  4. DThe third ionization potential of Mg is greater than the third ionization potential of Al .

Correct answer

B. The second ionization potential of Mg is greater than the second ionization potential of Na .

Step-by-step solution

The second ionization energy, i.e., IE 2 , of Mg is lower than that of Na because in case of Mg + , 3 s - electron has to be removed whereas in case of Na + , an electron is removed from the stable inert gas configuration which is difficult.

Practice Classification of Elements and Periodicity in Properties on Quantrex Academy →

More from Classification of Elements and Periodicity in Properties

The correct statement(s) regarding the periodic properties of elements is(are) 2026Match List-I with List-II. List-I Electronic configuration of neutral atom (where n=2 ) List-II 1^ st Ionization Energy (kJ mol ⁻¹ ) A. ns^2 I. 2080 B. ns^2np^1 II. 899 C. ns^2np^3 2026In a period, the first ionisation enthalpy of the element at extreme left and the negative electron gain enthalpy of the extreme right element, except noble gases, are respectively 2026Given below are two statements: Statement I: Aluminium is more electropositive than thallium as the standard electrode potential value of E^ _ Al ³⁺/ Al is negative and E^ _ Tl ³⁺/ 2026Given below are two statements : Statement I: The number of pairs among [Al₂O₃, Cr₂O₃] , [Cl₂O₇, Mn₂O₇] , [Na₂O, V₂O₃] and [CO, N₂O] that contain oxides of same nature (acidic, bas 2026Given below are two statements: Statement I: The correct order of electronegativity of fluorine, oxygen and nitrogen is F > O > N . Statement II: The oxidation state of oxygen in O 2026The 1^ st ionization enthalpy for Mg is +737 kJ/mol. The most probable estimated value of the 2^ nd ionization enthalpy of Mg is ______. 2026The electronegativity of a group 13 element 'E' is same as that of Ge (on Pauling scale and upto one decimal point). The CORRECT statements about E³⁺ are A. It can act as a reducin 2026 Full Classification of Elements and Periodicity in Properties list All Highly selective Backlog Qs for JEE Main PYQs