Question

Give reason for the following:
Hydrogen chloride gas cannot be dried over quick lime.

Answer 1

• Hydrogen chloride gas cannot be dried over quicklime because $HCl$ undergoes a chemical reaction with quicklime.
• As $HCl$ is acidic and $CaO$ is basic. So, they undergo a reaction.
• The reaction is: $2HCl+CaO\to CaC{l}_2+H_{2}O$