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If a substance turns blue litmus red and forms salt and water with another substance, what is the nature of the second substance?

Answer and explanation

Correct answer: Basic

Turning blue litmus red identifies the first substance as an acid. The characteristic neutralisation reaction is acid + base → salt + water. Since the first substance is already identified as an acid and the products are salt and water, the other reacting substance must be a base, or alkaline substance. Therefore option A is correct. Another acid would not normally give this neutralisation pattern, while a neutral gas or an unreactive metal does not fit the stated evidence.

Related tags

LitmusNeutralisationAcid-BaseAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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