JEE Main 2021ChemistryClassification of Elements and Periodicity in PropertiesEasyMCQ

JEE Main 2021 — Classification of Elements and Periodicity in Properties Question with Solution

JEE Main 2021 (18 Mar Shift 2)

Question

The first ionization energy of magnesium is smaller, as compared to that of elements X and Y, but higher than that of Z. The elements X, Y and Z, respectively, are :

Choose an option

Show full solutionCorrect option: C
Correct answer
Cargon, chlorine and sodium

Step-by-step explanation

The 1st IE order of 3rd period is

Na<Al<Mg<Si<S<P<Cl<Ar

X & Y are Ar & Cl

Z is sodium (Na).

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About this question

This is a previous-year question from JEE Main 2021, 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.