Question

What change in colour of a dry blue litmus paper you observed when HCI gas is passed on it:
(a) Red
(b) No change
(c) Orange
(d) Yellow​

Answer 1

Answer: No change

Explanation:

Here both the litmus paper and HCl is dry . HCl gas is act as acid. But acid released H+ ions in presence of H2O . that's why no change.