Question:
The oxide that shows magnetic property is :
The oxide that shows magnetic property is :
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Transition metal oxides (\(CrO_2, MnO, Fe_3O_4\)) are typical candidates for magnetic properties.
Updated On: Jan 12, 2026
- SiO₂
- Mn₃O₄
- MgO
- Na₂O
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The Correct Option is B
Solution and Explanation
Step 1: Magnetic properties arise from the presence of unpaired electrons, usually in transition metal ions.
Step 2: \(SiO_2\), \(MgO\), and \(Na_2O\) are diamagnetic (no unpaired electrons).
Step 3: \(Mn_3O_4\) (Hausmannite) contains \(Mn^{2+}\) and \(Mn^{3+}\) ions, both of which have unpaired electrons in their \(d\)-orbitals, making it paramagnetic or ferrimagnetic at low temperatures.
Step 2: \(SiO_2\), \(MgO\), and \(Na_2O\) are diamagnetic (no unpaired electrons).
Step 3: \(Mn_3O_4\) (Hausmannite) contains \(Mn^{2+}\) and \(Mn^{3+}\) ions, both of which have unpaired electrons in their \(d\)-orbitals, making it paramagnetic or ferrimagnetic at low temperatures.
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