In order to prepare dry hydrogen chloride gas in humid atmosphere the gas produced is passed through

Question

In order to prepare dry hydrogen chloride gas in humid atmosphere the gas produced is passed through a guard tube (drying tube) which contains\

Professor PC Thomas Classes · Answer

(a): In order to prepare hydrogen chloride $(\mathrm{HCl})$ gas in humid atmosphere, the gas produced is passed through a guard tube containing calcium chloride ( $\mathrm{CaCl}_{2}$ ) to dry the gas.\