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In which pair is the first substance acidic and the second substance basic?

Answer and explanation

Correct answer: Lemon juice and soap solution

Lemon juice contains citric acid, so it is acidic. Soap solution is generally alkaline because soap reacts with water to produce a basic solution. Thus the pair in option A has an acidic first substance and a basic second substance. In option B the order is reversed, option C contains neutral water followed by an acid, and option D contains two commonly basic substances rather than the requested acid–base order.

Related tags

Household-SubstancesAcidicBasicLemonSoapClass10AcidsBasesAnd SaltsAcids Bases And Salts

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