Question

dry hydrogen chloride gas does not turn blue litmus to red whereas aqueous hydrogen chloric acid does. why?

Answer 1

At room temperature, it is a colorless gas, which forms white fumes of hydrochloric acid upon contact with atmospheric water vapor. Hydrogen chloride gas and hydrochloric acid are important in technology and industry. Hydrochloric acid, the aqueous solution of hydrogen chloride, is also commonly given the formula HCl.

Answer 2

dry hydrogen chloride gas does not turn blue Litmus red because it is not acidic in nature whereas when HCL gas comes in contact with water it becomes acidic in nature and it turns blue Litmus red