Question 1: Palette 1/5

BITSAT 2025 MCQ

Among the following transition metal ions, how many have the same number of unpaired electrons, and thus approximately the same magnetic moment?

(i) $\mathrm{Cr}^{3+}$

(ii) $\mathrm{Fe}^{3+}$

(iii) $\mathrm{Mn}^{2+}$

(iv) $\mathrm{Co}^{2+}$

(v) $\mathrm{Ni}^{2+}$

A

1

B

2

C

3

D

4

Question 2: Palette 2/5

BITSAT 2025 MCQ

The $\mathrm{Fe}^{3+}$ ion, having five unpaired electrons, shows a spin-only magnetic moment closest to

A

4

B

5

C

6

D

7

Question 3: Palette 3/5

BITSAT 2024 MCQ

In the following species, how many species have same magnetic moment?

(i) $ \mathrm{Cr}^{2+} $ (ii) $ \mathrm{Mn}^{3+} $ (iii) $ \mathrm{Ni}^{3+} $ (iv) $ \mathrm{Sc}^{2+} $ (v) $ \mathrm{Zn}^{2+} $ (vi) $ \mathrm{V}^{3+} $ (vii) $ \mathrm{Ti}^{+} $

A

1

B

3

C

2

D

4

Question 4: Palette 4/5

BITSAT 2024 MCQ

The spin only magnetic moment of $ \mathrm{Fe}^{3+} $ ion (in BM) is approximately.

A

4

B

5

C

6

D

7

Question 5: Palette 5/5

BITSAT 2020 MCQ

Which of the following is not a mixed pair of oxides?

A

Mn₃O₄ and Co₃O₄

B

Co₃O₄ and Pb₃O₄

C

Pb₃O₄ and Mn₃O₄

D

Fe₃O₄ and Fe₂O₃