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In a solution, pH paper becomes deep red and blue litmus turns red. What is the safest conclusion?

Answer and explanation

Correct answer: The solution is strongly acidic

Blue litmus turning red is the standard indication of an acidic solution. Deep red on pH paper generally corresponds to a very low pH, indicating strong acidity rather than neutrality or basicity. Taken together, the observations support the conclusion that the solution is strongly acidic. The result does not prove that it contains only one substance or only salt, so option A is the safest and best answer.

Related tags

Ph PaperLitmusStrong AcidityAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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