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If blue litmus turns red in a solution and electric current also passes through it, which conclusion is strongest?

Answer and explanation

Correct answer: The solution is acidic and contains ions

Blue litmus changing to red is the standard indicator test for an acidic medium. Passage of current through an aqueous solution requires mobile charged particles, usually ions, to carry charge between the electrodes. Combining both observations gives the strongest conclusion in option A: the solution is acidic and contains ions. A neutral solution can also contain ions, but options B, C, and D do not fit the stated observations.

Related tags

Acidic SolutionConductivityLitmusAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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