Oxygen is released on heating :

zinc nitrate

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copper nitrate

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lead nitrate

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All of the above

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Solution

The correct option is D All of the above
When heated, lead nitrate crystals decompose to lead(II) oxide, oxygen and nitrogen dioxide. Because of this property, lead nitrate is sometimes used in pyrotechnics such as fireworks. On heating, zinc nitrate undergoes thermal decomposition to form zinc oxide, nitrogen dioxide and oxygen. $2 Z n (N O_{3})_{2} \to 2 Z n O + 4 N O_{2} + O_{2}$ . Copper(II) nitrate crystals will began to bubble and melt very quickly. After a short period of time, it will begin to glow, and it will turn green and release oxygen gas.

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