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Which of the following substances acts as a natural indicator?

Answer and explanation

Correct answer: Litmus

A natural indicator is a substance obtained from a natural source that shows different colours in acidic and basic media. Litmus, extracted from lichens, becomes red in an acidic solution and blue in a basic solution, so option A is correct. Sodium chloride, sugar, and distilled water are not ordinary natural acid–base indicators.

Related tags

Acids Bases SaltsNatural IndicatorsLitmusAcid Base IndicatorsAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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