What will be the action of the following substances on litmus paper? Dry.HCl gas, Moistened NH3 gas, Lemon juice, Carbonated soft drink, Curd, Soap solution.

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Ans: Dry HCl(hydrochloric acid) gas will have no effect on litmus paper. Moistened NH3 gas will turn red litmus blue. Curd, carbonated soft drink, lemon juice will turn blue litmus red. Soap solution will turn red litmus blue.

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