Question

Zinc carbonate on heating gives ______.

Options

• zinc oxide and carbon dioxide

• zinc oxide and sulphur dioxide

• zinc oxide and carbon dioxide and oxygen

• zinc oxide and nitrogen dioxide

Answer 1

Zinc carbonate on heating gives zinc oxide and carbon dioxide.

Explanation:

Heating zinc carbonate causes thermal decomposition into a solid residue of zinc oxide and carbon dioxide gas:

\[ \text{ZnCO}_3 \xrightarrow{\Delta} \text{ZnO} + \text{CO}_2 \]