Why does dry HCl gas not change the colour of the dry litmus paper? (

1.	Why does dry HCl gas not change the colour of the dry litmus paper? (OR) Prove that dry HCl gas is not an acid but HCl aqueous solution is an acid using an activity.
Answer» 1. Dry hydrogen chloride gas is not an acid. Hence it can’t turn blue litmus into red. 2. Hydrochloric acid is an aqueous solution. Hence it can turn blue litmus into red.

Why does dry HCl gas not change the colour of the dry litmus paper? (OR) Prove that dry HCl gas is not an acid but HCl aqueous solution is an acid using an activity.

Answer»

1. Dry hydrogen chloride gas is not an acid. Hence it can’t turn blue litmus into red.

2. Hydrochloric acid is an aqueous solution. Hence it can turn blue litmus into red.