Number of paramagnetic ions among the following d- and f-block metal ions is \ \ \ \ . Mn 2+ , Cu 2+ , Zn 2+ , Yb 2+ , Sc 3+ , La 3+ , Gd 3+ , Lu 3+ , Ti 4+ , Ce 4+ (Atomic number of Mn =25, Cu =29, Zn =30 , Yb =70, Sc =21, La =57, Gd =64, Lu =71 , Ti =22, Ce =58 )

Chemistry · d and f Block Elements

JEE Main 2026 — 2 April, Evening Shift — Question 66

Number of paramagnetic ions among the following d- and f-block metal ions is $\_\_\_\_$ . $\mathrm{Mn}^{2+}, \mathrm{Cu}^{2+}, \mathrm{Zn}^{2+}, \mathrm{Yb}^{2+}, \mathrm{Sc}^{3+}, \mathrm{La}^{3+}, \mathrm{Gd}^{3+}, \mathrm{Lu}^{3+}, \mathrm{Ti}^{4+}$ , $\mathrm{Ce}^{4+}$ (Atomic number of $\mathrm{Mn}=25, \mathrm{Cu}=29, \mathrm{Zn}=30$ , $\mathrm{Yb}=70, \mathrm{Sc}=21, \mathrm{La}=57, \mathrm{Gd}=64, \mathrm{Lu}=71$ , $\mathrm{Ti}=22, \mathrm{Ce}=58$ )

Answer: 3

Numerical answer — enter this value.

Step-by-step solution

Paramagnetic : $\mathrm{Mn}^{+2}, \mathrm{Cu}^{+2}, \mathrm{Gd}^{+3}$ Diamagnetic : $\mathrm{Zn}^{+2}, \mathrm{Yb}^{+2}, \mathrm{Sc}^{+3}, \mathrm{La}^{+3}, \mathrm{Lu}^{+3}, \mathrm{Ti}^{+4}$ , $\mathrm{Ce}^{+4}$

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Exam: JEE Main 2026
Paper: 2 April, Evening Shift
Subject: Chemistry
Chapter: d and f Block Elements
Topic: Introduction and Properties of Transition Elements