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A farmer has highly acidic soil and wants to reduce its acidity without harming crop roots. Which substance is most suitable?

Answer and explanation

Correct answer: Slaked lime

Highly acidic soil can be corrected by adding a suitable mild base that neutralises excess acidity. Slaked lime is calcium hydroxide, Ca(OH)₂, and is commonly used in controlled amounts for this purpose; it reacts with acids to form salt and water. Therefore option A is the best choice. Vinegar is acidic and would worsen the condition, while sodium chloride is not a useful neutralising agent and ammonium chloride can contribute to soil acidity rather than correct it.

Related tags

Acidic SoilSlaked LimeNeutralisationAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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