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If hydrogen ions and hydroxide ions are nearly balanced in a solution, what colour will universal indicator show?

Answer and explanation

Correct answer: Green

When hydrogen ions and hydroxide ions are present in nearly equal effective amounts, their acid and base effects balance, giving an approximately neutral solution. Neutral water has pH close to 7. Universal indicator shows green around pH 7. Red and orange indicate acidic conditions, whereas violet indicates a strongly alkaline condition. Therefore the expected colour is green, making option B correct.

Related tags

Universal IndicatorNeutralityPhAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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