Why dry HCl gas does not show acidic behavior?

Why do acids not show acidic behaviour in the absence of water?

Hydrogen is obtained by displacement from dilute hydrochloric acid Write equations using zinc. Why copper does not show similar behaviour?

Why do HCl, HNO_(3) , etc., show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character?

The weakest acid (does not show acidic character) is:

HCl base not behave as acid in

Which of the following reactions does not show the acidic nature of ethyne?

Why does dry HCl gas not change the colour of the dry litmus paper?

In physisorption adsorbent does not show specificity for any particular gas because ……. .

In physisorption adsorbent does not show specificity for any particular gas because ……..