Question

Which of the following is true?




Dry HCl gas turns blue litmus paper red

Dry HCl gas doe not change the colour of blue litmus paper.

Dry HCl gas changes the colour of moist blue litmus paper Red.

Both 2nd and 3rd.​

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

Dry HCI gas turns blue litmus paper red