JEE Main 2019Chemistryd and f Block ElementsMediumMCQ

JEE Main 2019 — d and f Block Elements Question with Solution

JEE Main 2019 (10 Apr Shift 1)

Question

Consider the hydrated ions of Ti2+, V2+, Ti3+ and Sc3+ . The correct order of their spin-only magnetic moments is:

Choose an option

Show full solutionCorrect option: C
Correct answer
CSc3+<Ti3+<Ti2+<V2+

Step-by-step explanation

Magnetic moment μ=nn+2
More than value of n, more will be magnetic moment.
Ti+2 electronic configuration;
3d2  μ=22+2=2.82
Ti+3⇒3d1 μ=11+2=3=1.73
V+2⇒3d3 μ=33+2=3.87
Sc3+⇒Ar no unpaired electron. →μ=0
Hence Order of Magnetic Moment is  V+2>Ti+2>Ti+3>Sc+3

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About this question

This is a previous-year question from JEE Main 2019, 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.