JEE Main 2021 — D And F Block Elements Question with Solution
From: JEE Main 2021 (Online) 24th February Evening Shift
Question
What is the correct order of the following elements with respect to their density?
Choose an option
Show full solutionCorrect option: C
Correct answer
CZn < Cr < Fe < Co < Cu
Step-by-step explanation
Generally, due to decrease in metallic radius and increase in atomic mass density increase across the period from left to right.
| Metal | Density |
|---|---|
| Zn | 7.13 |
| Cr | 7.19 |
| Fe | 7.8 |
| Co | 8.7 |
| Cu | 8.9 |
Correct order is Cu > Co > Fe > Cr > Zn.
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This is a previous-year question from JEE Main 2021, covering the D And F Block Elements 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.