Single Choice

Which of the following has the highest paramagnetism?

A$$[Cr(H_2O)_6]^{3+}$$
B$$[Fe(H_2O)_6]^{2+}$$
Correct Answer
C$$[Cu(H_2O)_6]^{2+}$$
D[Zn(H2O)6]2+

Solution

Paramagnetism $$\propto$$ Number of unpaired electrons

In $$\displaystyle [Cr(H_2O)_6]^{3+} $$, Cr(III) has $$\displaystyle 3d^3$$ outer electronic configuration with 3 unpaired electrons.

In $$\displaystyle [Fe(H_2O)_6]^{2+} $$, Fe(II) has $$\displaystyle 3d^6 $$ outer electronic configuration with 4 unpaired electrons.

In $$\displaystyle [Cu(H_2O)_6]^{2+}$$, Cu(II) has $$\displaystyle 3d^9$$ electronic configuration with 1 unpaired electron.

In $$\displaystyle [Zn(H_2O)_6]^{2+}$$, Zn(II) has $$\displaystyle 3d^{10}$$ electronic configuration with 0 unpaired electrons.

$$\displaystyle [Fe(H_2O)_6]^{2+} $$ has the highest paramagnetism as it contains a maximum number of unpaired electrons.

Hence, option $$B$$ is correct.

SIMILAR QUESTIONS

d - block and f - block Elements

Select the correct order with respect to paramagnetic property of the ions.

d - block and f - block Elements

The magnetic moment of $$[Cu(NH_{3})_{4}]^{2+}$$ was found to be 1.73 B.M. The number of unpaired electrons in the complex is:

d - block and f - block Elements

Which of the following ions having the following electronic structure would have a maximum magnetic moment?

d - block and f - block Elements

Titanium shows the magnetic moment of 1.73 B.M. in its compound. What is the oxidation number of $$Ti$$ in the compound?

d - block and f - block Elements

The correct order of the spin-only magnetic moment of metal ions in the following low spin complexes, $$[V(CN)_6]^{4-}, [Fe(CN)_6]^{4-}$$, $$[Ru(NH_3)_6]^{3+}, $$ and $$[Cr(NH)_3)_6]^{2+}$$, is:

d - block and f - block Elements

The calculated spin-only magnetic moments (BM) of the anionic and cationic species of $$[Fe(H_2O)_6]_2$$ and $$[Fe(CN)_6]$$, respectively, are:

d - block and f - block Elements

Consider the hydrates ions of $$Ti^{2+}, V^{2+}, Ti^{3+}$$ and $$Sc^{3+}$$. The correct order of their spin-only magnetic moments is:

d - block and f - block Elements

The INCORRECT statement is:

d - block and f - block Elements

The correct order of spin-only magnetic moments among the following is: (Atomic number: $$Mn=25, Co=27, Ni=28, Zn=30)$$.

d - block and f - block Elements

Which of the following transition metal ions will have definite value of magnetic moment?

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