JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 24 February 2021, Shift 2, Chemistry Q39

Question 39 of 90 in this shift, Chemistry question 9 of 30, Section A.

What is the correct order of the following elements with respect to their density ?

(1)Cr $<$ Fe $<$ Co $<$ Cu $<$ Zn
(2)Zn $<$ Cr $<$ Fe $<$ Co $<$ CuOfficial answer
(3)Zn $<$ Cu $<$ Co $<$ Fe $<$ Cr
(4)Cr $<$ Zn $<$ Co $<$ Cu $<$ Fe

Official answer

Option 2

NTA final key.

Chapter: The d- and f-Block Elements
Topic: d-Block Elements
Idea tested: Density Trends and Maxima

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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.