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A student places red litmus paper in a solution, and it turns blue. What type of solution is it?

Answer and explanation

Correct answer: Basic solution

The governing concept is the action of indicators: a base changes red litmus to blue, whereas an acid changes blue litmus to red. Since the given solution produces the red-to-blue change, it is basic and option B is correct. A neutral solution normally causes no colour change. Option D is also inconsistent because the question clearly describes a change in colour.

Related tags

Acids Bases SaltsLitmus TestIndicatorsBasic SolutionClass 10 ScienceAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And Behaviour

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