Chlorine is 2.5 times havier than air.
Chlorine is a clear amber-colored liquid about 1.5 times heavier than water. Gaseous chlorine is greenish-yellow, about 2.5 times as heavier than air.
Describe an experiment to prove the following: (i) HCl gas is heavier than air. (ii) HCl gas is highly soluble in water. (iii) HCl gas contains the element chlorine.