When $Z n C O_{3}$ is heated in the absence of oxygen it gives :

O_{2}

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C O_{2}

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H_{2} O

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C O

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Solution

The correct option is C $C O_{2}$
Calcination is the process when metal carbonates are heated in absence of oxygen to get the metal oxide and the carbon dioxide process.
${Z n C O}_{3} △ - \to Z n O + {C O}_{2} ↑$

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When ZnCO3 is heated in the absence of oxygen it gives :

The correct option is C CO2Calcination is the process when metal carbonates are heated in absence of oxygen to get the metal oxide and the carbon dioxide process.ZnCO3△−→ZnO+CO2↑

When $Z n C O_{3}$ is heated in the absence of oxygen it gives :

The correct option is C $C O_{2}$
Calcination is the process when metal carbonates are heated in absence of oxygen to get the metal oxide and the carbon dioxide process.
${Z n C O}_{3} △ - \to Z n O + {C O}_{2} ↑$