Question

why dry HCL gas does not change the colour of blue litmus paper ​

Answer 1

Explanation:

Dry HCL it does not dissociate to give H+ ions. Acids dissociate to give ions only in the aqueous solution. In this, HCL is not in the aqueous form nor the litmus paper is wet, so the colour of the litmus paper does not change

Answer 2

Answer:

First of all a safe day to you.

Explanation: Actually Dry HCl doesn't seeps into the Litmus Paper.

Its necessary for any acid or a base to be in a liquid form to litmus paper to work.

hope this helps you buddy.