Question

Compound 'X' decomposes to give quick lime and a gas 'Y' through lime water, lime water turns milky. The compound 'X' and the gas 'Y' respectively are..............?

Answer 1

$\textbf{\huge{Hallo! }}$

✔The compound X is$\color{red}{Calcium\:Carbonate }$

✔The gas Y is carbon dioxide$\color{red}{Carbon }$$\color{red}{Dioxide }$

↘Calcium carbonate(limestone)decomposes to give calcium oxide (quick lime) and Carbon dioxide.

The equation for the reaction is,

CaCO₃ ------------->CaO + CO₂

↘When Carbon dioxide is passed through lime water(Calcium Hydroxide), lime water turns milky.

The equation for the reaction is,

CO₂ + Ca(OH)₂ -------------> CaCO₃↓ + H₂O.

↘It turns milky because of the formation of Precipitate of insoluble Calcium Carbonate.