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What colour does red litmus turn in a basic solution?

Answer and explanation

Correct answer: Blue

The governing concept is the litmus test for a base. A basic or alkaline solution changes red litmus to blue because the indicator responds to the presence of basic ions, commonly associated with OH⁻ in water. Red is the original colour of the test paper, whereas white and orange are not the standard outcomes. Therefore, the correct observation is blue, given in option B.

Related tags

BasesLitmusIndicatorsAlkaline SolutionAcidsAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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