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D and F Block Elements question

2024 · Q136

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D and F Block Elements
2024 · Q136

D and F Block Elements question

2024 · Q136

NEETChemistryD and F Block ElementsMCQ+4 / −1

The pair of lanthanoid ions which are diamagnetic is

A
$\mathrm{Ce}^{4+}$ and $\mathrm{Yb}^{2+}$
B
$\mathrm{Ce}^{3+}$ and $\mathrm{Eu}^{2+}$
C
$\mathrm{Gd}^{3+}$ and $\mathrm{Eu}^{3+}$
D
$\mathrm{Pm}^{3+}$ and $\mathrm{Sm}^{3+}$

View written solutionFree

Correct answer: A

Magnetic moment $\mu=\sqrt{n(n+2)}$

$$\mathrm{n} \rightarrow$$ number of unpaired electron

NEET 2024 Chemistry - d and f Block Elements Question 9 English Explanation

Hence $\mathrm{Ce}^{4+}$ and $\mathrm{Yb}^{2+}$ are only diamagnetic.

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