Why does the colour of dry blue litmus paper remains unchanged even when it is brought in contact with HCl gas?
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✓✓™®©To change the colour of blue litmus paper to red, there must be a presence of acid.
☑️Dry HCl gas is not acidic because water is required for the dissociation of HCl into H+ and Cl-. Therefore, dry HCl gas is not acidic and will not change the colour of dry blue litmus paper.....
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Answer:
HCL is not dissociated to H+
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