Why does dry HCl gas not change the colour of the dry litmus paper?
NCERT Class 10th Science Chapter 2 Acids Bases and Salts
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HCL gas does not change the colour of a dry Litmus Paper because it is not ionized hydrogen ions authors we can say that that we it will not show the properties of the acidic characters so it will not change the colour of dry Litmus Paper
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HCL acid can be considered as the strongest monobasic acid in the water. It could be dissociated as hydrogen (H+) and chlorine (Cl-) ions where H+ impart the acidity of the solution.
Explanation:
- The dry HCL is not dissociated into any ion and hence it is neither an acid nor a base.
- Therefore it is neutral in dry state. This dry HCL would not change the colour of the litmus paper.
- Because there is no presence of hydronium ions (hydronium ions are responsible for colour change in litmus paper).
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