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Which substance should a farmer add to acidic soil to increase its pH?

Answer and explanation

Correct answer: Calcium oxide

The pH of acidic soil is increased by adding a basic substance that neutralises excess acidity. Calcium oxide is a basic oxide and reacts with acidic components to reduce their effect, so option A is correct. Sodium chloride is essentially a neutral salt, while ethanoic acid would add acidity. Carbon dioxide can form carbonic acid in moist soil and is therefore not the suitable choice.

Related tags

ScienceClass10Soil-PhNeutralisationCalcium-OxideAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And Behaviour

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