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31/10/2020 1:31 pm
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Dry ammonia gas has no action on litmus paper, but a solution of ammonia in water turns red litmus paper blue. Why is it so?
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31/10/2020 1:32 pm
Ammonia dissolves in water, forms ammonium hydroxide which is base and turns red litmus blue.
NH3 + H2O → NH4+ + OH–
Dry ammonia gas does not change into OH– ions.