The oxide that shows a magnetic property is:

S i O_{2}

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N a_{2} O

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M n_{3} O_{4}

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M g O

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Solution

The correct option is C $M n_{3} O_{4}$
$S i^{+ 4}, N a^{+}, M g^{2 +}$ do not have an unpaired electron so they don't show magnetic property.
$M n_{3} O_{4}$ exists as $M n O . M n_{2} O_{3}$
Manganese is present in two oxidation states +2 and +3.
Outer electronic configuration of $M n^{3 +}$ is $3 d^{4}$
It has unpaired electrons hence it is paramagnectic in nature.

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Similar questions

1.73 B M

Which of the following oxides shows electrical properties like metals ?

(a) $S i O_{2}$ (b) MgO (c) $S O_{2} () s$ (d) $C r O_{2}$

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