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Turmeric becomes reddish-brown and red litmus turns blue. Which ion will be in excess in the solution?

Answer and explanation

Correct answer: Hydroxide ion

The governing concept is the identification of bases by indicators. Turmeric changes to reddish-brown in a basic medium, and a base changes red litmus to blue. In an aqueous basic solution, hydroxide ions are present in excess relative to hydrogen ions. Thus option A is correct. Hydrogen ions would be associated with acidity, while chloride and nitrate ions are spectator ions and do not determine basicity by themselves.

Related tags

TurmericLitmusHydroxide IonAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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