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A student wants to increase the pH of acidic soil. Which of the following substances should be added to the soil?

Answer and explanation

Correct answer: Slaked lime, Ca(OH)₂

Slaked lime, Ca(OH)₂, is a base. It reacts with acidic substances in the soil and neutralises some of their acidity, thereby increasing the soil pH toward a more suitable range. Therefore option A is correct. Vinegar and lemon juice contain acids, while dilute hydrochloric acid is also acidic; adding any of these would generally lower pH rather than correct acidic soil.

Related tags

Soil PhSlaked LimeNeutralisationAcidic SoilAcids Bases SaltsAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And Behaviour

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