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Which oxide exhibits metallic-type electrical behavior?

1. Silicon dioxide
2. Magnesium oxide
3. Sulfur dioxide (solid)
4. Chromium dioxide

Correct answer: Chromium dioxide

Solution

Chromium dioxide is a transition metal oxide that exhibits metallic conductivity due to its partially filled d-orbitals, allowing for the movement of electrons, unlike the other options which are insulators or semiconductors.

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