Question

Dry hydrogen chloride gas does not turn blue litmus red brainly

Answer 1

due to absence of H+ and cl- ion in dry form .

Answer 2

The colour of litmus paper changes only in the presence of ions like hydrogen (H+) or hydronium (H3O+) ions. HCl can produce these ions only in the form of aqueous solution. Hence dry HCl gas does not change the colour of dry litmus paper.