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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceAssertion–reasonEasyConceptual

JEE Main 29 June 2022, Shift 2, Chemistry Q66

Question 66 of 90 in this shift, Chemistry question 6 of 30, Section A.

Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: The first ionization enthalpy for oxygen is lower than that of nitrogen. Reason R: The four electrons in 2p orbitals of oxygen experience more electron-electron repulsion. In the light of the above statements, choose the correct answer from the options given below
  1. (1)Both A and R are correct and R is the correct explanation of A.Official answer
  2. (2)Both A and R are correct but R is NOT the correct explanation of A.
  3. (3)A is correct but R is not correct.
  4. (4)A is not correct but R is correct.

Official answer

Option 1

NTA final key.

Chapter
Classification of Elements and Periodicity in Properties
Topic
Periodic Trends
Idea tested
p-Block Ionization Enthalpy Inversions

Same idea in other shifts

Asked 8× in all
  1. 4 Apr 2024, Shift 2 · Q67The correct order of the first ionization enthalpy isMediumSingle correct
  2. 11 Apr 2023, Shift 1 · Q64For elements B, C, N, Li, Be, O and F, the correct order of first ionization enthalpy isEasySingle correct
  3. 25 Jul 2022, Shift 2 · Q66The first ionization enthalpies of Be, B, N and O follow the orderEasySingle correct
  4. 27 Jul 2022, Shift 2 · Q66Outermost electronic configurations of four elements A, B, C, D are given below : (A) 3s23s^2 (B) 3s23p13s^23p^1 (C) 3s23p33s^23p^3 (D) 3s23p43s^23p^4…MediumSingle correct
  5. 29 Jul 2022, Shift 1 · Q64The first ionization enthalpy of Na, Mg and Si, respectively, are : 496, 737 and 786 kJ mol−1\mathrm{mol^{-1}}. The first ionization enthalpy…MediumSingle correct
  6. 4 Aug 2021, Shift 1 · Q35The correct order of first ionization enthalpy is :EasySingle correct
  7. 26 Feb 2021, Shift 1 · Q33Match List-I with List-II. List-I (Electronic configuration of elements) | List-II (ΔiH\Delta_i H in kJ mol−1^{-1}) (a) 1s2 2s21s^2\ 2s^2 | (i)…MediumMatch the list

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.