Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Why limewater turns milky when ${\text{CO}}_2$ is passed through it.

Answer 1

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> When carbon dioxide gas is passed through lime water, it turns milky due to the formation of calcium carbonate.
${\text{Ca(OH)}}_2$ $\text{(aq)}$ + ${\text{CO}}_2$ $\text{(g)}$ → ${\text{CaCO}}_3$ $\text{(s)}$ + ${\text{H}}_2\text{O}$ $\text{(l)}$