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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceSingle correctMediumConceptual

JEE Main 24 February 2021, Shift 1, Chemistry Q33

Question 33 of 90 in this shift, Chemistry question 3 of 30, Section A.

Consider the elements Mg, Al, S, P and Si, the correct increasing order of their first ionization enthalpy is :
  1. (1)Al < Mg < Si < S < POfficial answer
  2. (2)Mg < Al < Si < P < S
  3. (3)Mg < Al < Si < S < P
  4. (4)Al < Mg < S < Si < P

Official answer

Option 1

NTA final key.

Chapter
Classification of Elements and Periodicity in Properties
Topic
Periodic Trends
Idea tested
Penetration Effect on Ionization Enthalpy

Same idea in other shifts

Asked 2× in all
  1. 8 Jan 2020, Shift 1 · Q32The first ionization energy (in kJ/mol) of Na, Mg, Al and Si 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.