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A substance forms salt and water with acid but is insoluble in water. What is it called?

Answer and explanation

Correct answer: Base

A base is a substance that reacts with an acid to form salt and water, usually in a neutralisation reaction. Solubility is the key distinction here: an alkali is specifically a base that dissolves in water and produces hydroxide ions in solution. Since the stated substance is insoluble, it can be called a base but not an alkali. Therefore option A is correct; C is the reacting counterpart and D only detects chemical nature.

Related tags

BaseAlkaliSolubilityAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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