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A substance dissolves in water to produce hydroxide ions and feels soapy to touch. Which class does it belong to?

Answer and explanation

Correct answer: Base

According to the Arrhenius concept, a base is a substance that produces hydroxide ions, OH⁻, in aqueous solution. Many soluble bases also feel slippery or soapy because they react with oils on the skin; however, unknown substances should never be tested by touch. Acids produce H⁺ ions, a neutral salt is not necessarily hydroxide-producing, and a metal is a broader element class. Therefore option A is correct.

Related tags

BasesArrhenius-ConceptHydroxide-IonsAcidsAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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