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In a solution, blue litmus turns red, but red litmus shows no change. What is the nature of the solution?

Answer and explanation

Correct answer: Acidic

The governing concept is the litmus indicator test. An acidic solution changes blue litmus to red because hydrogen ions interact with the indicator. Red litmus does not show a further colour change because it already has the acid-side colour. A neutral solution changes neither strip, and a base would turn red litmus blue. Therefore, option C is correct.

Related tags

LitmusAcidic-SolutionIndicatorAcid-Base-TestAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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