JEE Main 2002 — D And F Block Elements Question with Solution
From: AIEEE 2002
Question
How do we differentiate between Fe3+ and Cr3+ in group III?
Choose an option
Show full solutionCorrect option: B
Correct answer
Bby increasing ion concentration
Step-by-step explanation
FeCl3 + 3NH4OH Fe(OH)3 ↓(reddish brown) + 3NH4Cl
CrCl3 + 3NH4OH Cr(OH)3 (Bluish green) + 3NH4Cl
CrCl3 + 3NH4OH Cr(OH)3 (Bluish green) + 3NH4Cl
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This is a previous-year question from JEE Main 2002, 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.