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If an unknown solution turns red litmus blue and has pH eleven, what is the most correct conclusion?

Answer and explanation

Correct answer: The solution is basic

The governing concept is the identification of acids and bases using indicators and pH. A basic solution changes red litmus to blue, while a pH greater than 7 indicates alkalinity; pH 11 is therefore basic. Both independent observations support option A. An acidic solution has pH below 7 and generally turns blue litmus red, a neutral solution has pH about 7, and an ion-containing solution is not ion-free.

Related tags

ScienceClass10PhLitmusAlkaline-SolutionAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And Behaviour

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