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A farmer finds that the soil is acidic, resulting in poor crop growth. Which substance should be added to reduce the acidity of the soil?

Answer and explanation

Correct answer: Quicklime, calcium oxide

Quicklime is calcium oxide, CaO, a basic oxide. When added carefully to acidic soil, it reacts with the excess acidic substances and helps neutralise them, bringing the soil closer to a suitable pH for crops. Hydrochloric acid and vinegar are acids and would increase acidity, while sodium chloride is not the appropriate neutralising material. Hence, option A is correct.

Related tags

Acids And BasesAcidic SoilNeutralisationQuicklimeAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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