JEE Main 2020ChemistryClassification of Elements and Periodicity in PropertiesMediumMCQ

JEE Main 2020 — Classification of Elements and Periodicity in Properties Question with Solution

JEE Main 2020 (03 Sep Shift 2)

Question

The five successive ionization enthalpies of an element are 800, 2427, 3658, 35024  32824 kJ mol–1 . The number of valence electrons in the element is:

Choose an option

Show full solutionCorrect option: C
Correct answer
C3

Step-by-step explanation

As difference in 3rd and 4th ionisation energies is high so atom contains 3 valence electrons.

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About this question

This is a previous-year question from JEE Main 2020, covering the Classification of Elements and Periodicity in Properties chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.