Question

What do you observe when

(c) Carbon dioxide is passed through lime water

Answer 1

Carbon dioxide that is present in the air reacts with lime water and turns it milky . This shows that air contain carbon dioxide

.${\mathrm{CO}}_{2_{\left(\mathrm{g}\right)}}+\mathrm{Ca}{\left(\mathrm{OH}\right)}_{2_{\left(\mathrm{aq}\right)}}\to {\mathrm{CaCO}}_{3_{\left(\mathrm{s}\right)}}+{\mathrm{H}}_2{\mathrm{O}}_{\left(\mathrm{l}\right)}$