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Why do farmers add slaked lime to soil when its pH is too low?

Answer and explanation

Correct answer: To reduce acidity and make soil suitable

A very low pH indicates that the soil is strongly acidic. Slaked lime, Ca(OH)2, is a basic substance, so it reacts with and neutralises excess acidic substances in the soil. This raises the pH toward a range more suitable for crop growth. The purpose is not to increase acidity, add ordinary salt, or remove water. Because the treatment is an acid-base neutralisation, option A gives the correct reason.

Related tags

Soil PhNeutralisationSlaked LimeAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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