JEE Main 2022 · ChemistryMultiple choiceSingle correctEasyApplication

JEE Main 27 June 2022, Shift 2, Chemistry Q65

Question 65 of 90 in this shift, Chemistry question 5 of 30, Section A.

The correct order of increasing ionic radii is

(1) $\mathrm{Mg^{2+} < Na^{+} < F^{-} < O^{2-} < N^{3-}}$ Official answer
(2) $\mathrm{N^{3-} < O^{2-} < F^{-} < Na^{+} < Mg^{2+}}$
(3) $\mathrm{F^{-} < Na^{+} < O^{2-} < Mg^{2+} < N^{3-}}$
(4) $\mathrm{Na^{+} < F^{-} < Mg^{2+} < O^{2-} < N^{3-}}$

Official answer

Option 1

NTA final key.

Chapter: Classification of Elements and Periodicity in Properties
Topic: Periodic Trends
Idea tested: Isoelectronic Species Radii Comparison

Same idea in other shifts

Asked 10× in all

5 Apr 2024, Shift 1 · Q66The statement(s) that are correct about the species $\mathrm{O^{2-}}$ , $\mathrm{F^-}$ , $\mathrm{Na^+}$ and $\mathrm{Mg^{2+}}$ . (A) All are…EasyOther
1 Feb 2024, Shift 1 · Q65In case of isoelectronic species the size of $\mathrm{F^-}$ , Ne and $\mathrm{Na^+}$ is affected by :EasySingle correct
15 Apr 2023, Shift 1 · Q87The total number of isoelectronic species from the given set is __________. $\mathrm{O^{2-}, F^-, Al, Mg^{2+}, Na^+, O^+, Mg, Al^{3+}, F}$ EasyNumerical value
27 Jun 2022, Shift 1 · Q65Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : The ionic radii…EasyAssertion–reason
27 Aug 2021, Shift 2 · Q32The correct order of ionic radii for the ions, $\mathrm{P^{3-}}$ , $\mathrm{S^{2-}}$ , $\mathrm{Ca^{2+}}$ , $\mathrm{K^{+}}$ ,…EasySingle correct
25 Jul 2021, Shift 1 · Q33The ionic radii of $\mathrm{K^+}$ , $\mathrm{Na^+}$ , $\mathrm{Al^{3+}}$ and $\mathrm{Mg^{2+}}$ are in the order :EasySingle correct
25 Jul 2021, Shift 2 · Q34The ionic radii of $\mathrm{F^{-}}$ and $\mathrm{O^{2-}}$ respectively are 1.33 Å and 1.4 Å, while the covalent radius of N is 0.74 Å. The…EasySingle correct
18 Mar 2021, Shift 1 · Q34The ionic radius of $\mathrm{Na^+}$ ion is 1.02 Å. The ionic radii (in Å) of $\mathrm{Mg^{2+}}$ and $\mathrm{Al^{3+}}$ , respectively, are :EasySingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.