Which of the following(s) undergoes thermal decomposition to give off oxygen?

H g O

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A g_{2} O

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P b O_{2}

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All of the above

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Solution

The correct option is D All of the above
Thermal decomposition of oxides of metals:
$2 H g O (s) 450^{o} C - -- \to 2 H g (𝓁) + O_{2} (g) 2 A g_{2} O (s) 350^{o} C - -- \to 4 A g (s) + O_{2} (g) 2 P b O_{2} (s) Δ - \to 2 P b O (s) + O_{2} (g)$

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