Chemistry · Acids, Bases and Salts
Why does dry HCl gas not change the colour of dry litmus paper?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Dry HCl gas does not exhibit acidic properties under any condition.
- 2No H3O+ ions are present. Litmus changes colour only in the presence of H3O+ ions.✓
- 3Blue litmus becomes chemically inert in the presence of dry HCl gas.
- 4HCl gas acts as a strong dehydrating agent.
Correct answer
No H3O+ ions are present. Litmus changes colour only in the presence of H3O+ ions.
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