During the preparation of HCl gas on a humid day, the gas is usually passed through the guard tube containing CaCl₂. The purpose of using CaCl₂ is

Q. During the preparation of HCl gas on a humid day, the gas is usually passed through the guard tube containing CaCl₂. The purpose of using CaCl₂ is

1. To add moisture to the gas (HCl)
2. To absorb HCl gas
3. To absorb moisture from HCl gas
4. To Use it as a catalyst

Answer: To absorb moisture from HCl gas